GDPR

projektai-lsd Lithuanian Standards Board
Portal for draft standards

Extended search

till

Results

Showing:
Total records found: 274
arrow-prev 1 2 3 4 5 11 arrow-next
prEN ISO 6704 Public enquiry
Comment end date 2026-08-20
Automatic steam traps - Classification (ISO/DIS 6704:2026)

Establishes a simple classification of the main types according to the mode of actuation of their obturation device and disregarding their details of conception and construction. Three categories of steam traps can be distinguished: mechanical traps, actuated by the level of condensate; thermostatic traps, actuated by the temperature of the condensate; thermodynamic traps, actuated by fluid dynamics.

EN 1993-1-8:2024/prA1 Archived
Comment end date 2026-06-25
Eurocode 3 - Design of steel structures - Part 1-8: Joints

1.1 Scope of FprEN 1993-1-8 (1) FprEN 1993-1-8 provides rules for structural design of joints subject to predominantly static loading using all steel grades from S235 up to and including S700, unless otherwise stated in individual clauses. NOTE As an alternative to the design rules provided in Clause 9, the design rules given in CEN/TR 1993-1-801 "Eurocode 3: Design of steel structures - Part 1 801: Hollow section joints design according to the component method" can be used. (2) The provisions in this document apply to steels complying with the requirements given in EN 1993 1 1 and to material thickness greater than or equal to 3 mm, unless otherwise stated in individual clauses. 1.2 Assumptions (1) Unless specifically stated, EN 1990, EN 1991 (all parts) and the other relevant parts of EN 1993-1 (all parts) apply. (2) The design methods given in FprEN 1993-1-8 are applicable if: - the execution quality is as specified in EN 1090-2, and - the construction materials and products used are as specified in the relevant parts of EN 1993 (all parts), or in the relevant material and product specifications.

prEN ISO 23402-2 Public enquiry
Comment end date 2026-06-30
Dentistry - Portable dental equipment for use in non‐permanent healthcare environments - Part 2: Portable dental units (ISO/DIS 23402-2:2026)
prEN 14175-9 Public enquiry
Comment end date 2026-07-21
Fume cupboards — Part 9: Fume cupboards, ducted with filtered internal recirculation

This document specifies characteristics concerning the design and performance requirements together with type testing and on-site testing procedures especially for ducted filtration fume cupboards (DFFCs) not described in the other parts of EN 14175. Filters in DFFCs can be specific filters or a combination of filters dependent on the characteristics of the contaminants to be removed. This part of EN 14175 is related to and refers to other parts of EN 14175 regarding definitions, technologies, testing methodologies, design factors and functional aspects and is read in conjunction with these. This standard covers the specific layout version of ducted fume cupboards with integral filtration. These devices called ducted filtration fume cupboards can be designed to partially reuse filtered air for internal dilution. Therefore, the term “hybrid” fume cupboards is sometimes used. Fume cupboards with associated filters are considered as standard fume cupboards according EN 14175 1 to EN 14175 3. NOTE Their filter requirements, description and testing are listed in Annex A for information. The requirements for fume cupboards and filters for radioactive work are described in detail in EN 14175 8. Recirculatory filtration fume cabinets which return the filtered exhaust air back into the surrounding room are not part of this document but described in prEN 17242. DFFCs are not foreseen for work with pathogens. Appropriate microbiological cabinets are described in the EN 12469 series.

prEN 13201-2 Public enquiry
Comment end date 2026-07-23
Road lighting - Part 2: Performance requirements

This part of this European Standard defines performance requirements which are specified as lighting classes for road lighting aiming at the visual needs of road users, and it considers environmental aspects of road lighting. NOTE Installed luminous intensity classes for the restriction of disability glare and control of obtrusive light and installed glare index classes for the restriction of discomfort glare are defined in the informative Annex A. Lighting of pedestrian crossings is discussed in the informative Annex B. Disability glare evaluation for conflict areas (C classes) and pedestrian and pedal cyclists (P classes) is discussed in the informative Annex C.

prEN 16985 Public enquiry
Comment end date 2026-08-13
Booths for application of coating material - Safety requirements

This document specifies requirements against all significant hazards, hazardous situations and hazardous events relevant to booths for the application of coating material, when they are used as intended, including reasonably foreseeable misuse. See Annex A for significant hazards. This document also specifies recommendations for minimizing environmental impact of booths for the application of coating material. See Annex F for recommendations for minimizing environmental impact and energy usage. Interfaces between booths and other machinery used in application of coating material are given in Figure 1. The specific significant risks related to the use of this machinery with foodstuff and pharmaceutical products are not dealt with in this document. The specific significant risks related to drying operation of combined booths for application and drying of coating material are not dealt with in this document, but in EN 1539:2015. [Figure 1] This document is not applicable to: - spaces for application of coating material consisting only of an extraction wall; - platforms attached to booths (e.g. for touch-up jobs); - booths for application of flock (see EN 50223:2015); - airflow requirements for booths with airflow from horizontal inlet to vertical extraction. This document is not applicable to machinery manufactured before the date of its publication as European Standard.

prEN ISO/IEC 25029 Public enquiry
Comment end date 2026-08-21
Artificial intelligence - AI-enhanced nudging (ISO/IEC DIS 25029:2026)

This standard applies to nudging mechanisms enhanced by AI systems. This document provides definitions, concepts, and guidelines to address AI-enhanced nudging mechanisms by organisations. This standard aims to support organisations to deal with AI-enhanced nudging mechanisms in alignment with existing AI standards. “AI-enhanced nudging mechanisms” are a sub category of digital nudges and which are enhanced by AI systems. It provides use-cases to illustrate AI-enhanced nudging mechanisms. It provides guidelines and requirements for designing responsible AI-enhanced nudging mechanisms. This includes horizontal processes and key indicators using specific vertical examples.

ISO/DIS 11452-8.2 Public enquiry
Comment end date 2026-08-15
Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 8: Immunity to magnetic fields
EN 1996-1-2:2024/prA1 Archived
Comment end date 2026-06-25
Eurocode 6 - Design of masonry structures - Part 1-2: Structural fire design

1.1 Scope of prEN 1996-1-2 (1) This document gives rules for the design of masonry structures for the accidental situation of fire exposure. This document only identifies differences from, or supplements to, normal temperature design. (2) This document applies to structures, or parts of structures, that are within the scope of EN 1996-1-1 or EN 1996-3 and are designed accordingly. (3) This document gives rules for the design of structures for specified requirements in respect of the aforementioned functions and the levels of performance. (5) This document does not cover masonry built with natural stone units according to EN 771-6. (6) This document deals with: - non-loadbearing internal walls; - non-loadbearing external walls; - loadbearing internal walls with separating or non-separating functions; - loadbearing external walls with separating or non-separating functions. 1.2 Assumptions (1) The assumptions of EN 1990 and EN 1996-1-1 apply to this document. (2) This document is intended to be used together with EN 1990, EN 1991-1-2, EN 1996-1-1, EN 1996 2 and EN 1996-3. (3) In addition to the general assumptions of EN 1990 and EN 1996-1-1, the following assumptions apply: - the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel, or is given by the relevant national regulation; - any fire protection measure taken into account in the design will be adequately maintained.

prEN ISO 19650-3 Public enquiry
Comment end date 2026-07-21
Organization and digitization of information about buildings and civil engineering works, including building information modelling (BIM) - Information management - Part 3: Implementation of the information management process (ISO/DIS 19650-3:2026)

This document gives guidelines for the implementation of the information management process, in accordance with the requirements of ISO 19650-2.

prEN IEC 60335-2-39:2026/prAA:2026 Public enquiry
Comment end date 2026-07-29
Household and similar electrical appliances - Safety - Part 2-39: Particular requirements for commercial electric multi-purpose cooking pans

This European Standard Deals with the safety of electrically operated commerical multi-purpose cooking pans not intended for household use. The rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances. Appliances within the scope of this standard are typically used in restaurants, canteens, hospitals, and commercial enterprises such as bakeries, butcheries, etc. The electrical part of appliances making use of other forms of energy is also within the scope of this standard.

prEN ISO 7551 Public enquiry
Comment end date 2026-08-06
Dentistry - Endodontic absorbent points (ISO/DIS 7551:2026)

This document specifies the requirements and test methods for sterilized absorbent points used in endodontic procedures. Absorbent points are marketed sterilized or non-sterilized. The requirements apply to absorbent points which have been sterilized once in a manner approved by the manufacturer. This document specifies numerical systems and a colour-coding system for designating the sizes of absorbent points. Clause 7 specifies the labelling and packaging needed, including the instructions for use. A claim by the manufacturer that the contents of the unopened pack are sterile is the responsibility of the manufacturer (see Table 2). This document does not specify requirements or test methods for sterility. NOTE 1 Reference to applicable national regulations can be made. Reference is made to internationally accepted pharmacopoeia. NOTE 2 National requirements can apply. Standards on methods of validating sterilization processes are also available: ISO 11137-1, ISO 11137-2 and ISO 11137-3.

prEN IEC 60335-2-47:2026/prA1:2026 Public enquiry
Comment end date 2026-08-19
Household and similar electrical appliances - Safety - Part 2-47: Particular requirements for commercial electric boiling pans

This European Standard deals with the safety of electrically operated commercial boiling pans not intended for household use. The rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral, and 480 V for other appliances. Appliances which are within the scope of this standard are typically used in restaurants, canteens, hospitals and commercial enterprises such as bakeries, butcheries,etc.

prEN ISO 10704 Public enquiry
Comment end date 2026-07-12
Water quality - Gross alpha and gross beta activity - Test method using thin source deposit (ISO/DIS 10704:2026)

Warning — Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices. IMPORTANT — It is absolutely essential that tests conducted in accordance with this document be carried out by suitably qualified staff. This document specifies a method for the determination of gross alpha and gross beta activity concentrations for alpha- and beta-emitting radionuclides. Gross alpha and gross beta activity measurement is not intended to give an absolute determination of the activity concentration of all alpha and beta emitting radionuclides in a test sample, but is a screening analysis to ensure particular reference levels of specific alpha and beta emitters have not been exceeded. This type of determination is also known as gross alpha and gross beta index. Gross alpha and gross beta analysis is not expected to be as accurate nor as precise as specific radionuclide analysis after radiochemical separations. Maximum beta energies of approximately 0,1 MeV or higher are well measured. It is possible that low energy beta emitters cannot be detected (e.g. 3H, 55Fe, 241Pu) or can only be partially detected (e.g. 14C, 35S, 63Ni, 210Pb, 228Ra). If the presence of low-energy beta emitters is strongly suspected, liquid scintillation analysis is recommended (ISO 11704). The method described in this document applies to non-volatile radionuclides, since some gaseous or volatile radionuclides (e.g. radon and radioiodine) can be lost during the source preparation. The method described in this document is applicable to test samples of drinking water, rainwater, sea water, surface and ground water as well as cooling water, industrial water, domestic and industrial wastewater after proper sampling, sample handling and test sample preparation (filtration when necessary and taking into account the amount of dissolved material in the water). The method described in this document can be used in the event of an emergency situation, because the results can be obtained in less than 1 h. Detection limits reached for gross alpha and gross beta are less than 10 Bq·l-1 and 20 Bq·l-1, respectively, for instance for rainwater water. The evaporation of a 10 ml sample can be carried out in 20 min followed by 10 min counting using a gas-flow -proportional counter with window. It is the laboratory’s responsibility to ensure the suitability of this test method for the water samples tested.

prEN ISO 10426-1 Public enquiry
Comment end date 2026-07-02
Oil and gas industries including lower carbon energy - Cements and materials for well cementing - Part 1: Specification (ISO/DIS 10426-1:2026)

ISO 10426-1:2009 specifies requirements and gives recommendations for six classes of well cements, including their chemical and physical requirements and procedures for physical testing. ISO 10426-1:2009 is applicable to well cement classes A, B, C and D, which are the products obtained by grinding Portland cement clinker and, if needed, calcium sulfate as an interground additive. Processing additives can be used in the manufacture of cement of these classes. Suitable set-modifying agents can be interground or blended during manufacture of class D cement. ISO 10426-1:2009 is also applicable to well cement classes G and H, which are the products obtained by grinding clinker with no additives other than one or more forms of calcium sulfate, water or chemical additives as required for chromium (VI) reduction.

prEN 646 Public enquiry
Comment end date 2026-07-21
Paper and board intended to come into contact with foodstuffs - Determination of colour fastness of dyed paper and board

This document describes procedures for the testing of dyed paper and board intended to come into contact with foodstuffs. Some procedures depending on the foreseeable use of the material are given. Visual evaluation against a grey scale provides grading of the bleeding. For samples having significant different sides, a migration can occur from one glass fibre to the other and could lead to wrong interpretation of the fastness of one side. It is advisable to check these samples using large sampling procedure to prevent cross contamination of the glass fibre during the migration procedure. The procedure is described in Annex A. If lower limit of detection is required, this procedure could also be used.

prEN IEC 60335-2-36:2026/prA1:2026 Public enquiry
Comment end date 2026-07-29
Household and similar electrical appliances - Safety - Part 2-36: Particular requirements for commercial electric cooking ranges, ovens, hobs and hob elements

This standard deals with the safety of electrically operated commercial cooking and baking ranges, ovens, hobs, hob elements and similar appliances, their rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances.

prEN IEC 63203-801-2:2026 Public enquiry
Comment end date 2026-08-21
Wearable electronic devices and technologies - Part 801-2: Smart body area network (SmartBAN) - Low complexity medium access control (MAC) for SmartBAN
prEN 16002 Public enquiry
Comment end date 2026-08-25
Flexible sheets for waterproofing - Determination of the resistance to wind load of mechanically fastened flexible sheets for roof waterproofing

This document specifies a test method to determine the resistance to wind load of mechanically fastened flexible sheets for roof waterproofing. The assessment is limited to the performance of the mechanically fastened flexible sheets only. The test method does not include the determination of the performance of the fixing element and the mechanical fastener in combination with the structural deck.

prEN 1995-1-3 Public enquiry
Comment end date 2026-07-04
Eurocode 5 - Design of timber structures - Part 1-3: Timber-concrete composite structures

(1) EN 1995-1-3 gives design rules for timber-concrete composite structures. (2) EN 1995-1-3 provides requirements for materials, design parameters, connections, detailing and execution for timber-concrete composite structures. NOTE: Recommendations for environmental parameters (temperature and moisture content), design methods and test methods are given in Annexes. (3) EN 1995-1-3 covers the design of timber-concrete composite structures in both quasi-constant and variable environmental conditions. It provides design rules for quasi-constant environmental conditions rules for variable environmental conditions. (4) EN 1995-1-3 excludes details for the design of glued timber-concrete composites and systems relying on friction. NOTE: For design of bridges see EN 1995-2.

prEN ISO/IEC 14763-5:2026 Public enquiry
Comment end date 2026-07-15
Information technology - Implementation and operation of customer premises cabling - Part 5: Sustainability

This document specifies requirements and recommendations to maximize the sustainability of cabling systems including both customer premises infrastructure and the accommodation of information technology equipment by addressing the a) cabling design; b) selection, packaging and transportation of components and related materials; c) installation, operation and maintenance; d) management of waste materials; e) skill sets necessary for designers, installers and users.

prEN IEC 60335-2-38:2026/prAA:2026 Public enquiry
Comment end date 2026-08-05
Household and similar electrical appliances - Safety - Part 2-38: Particular requirements for commercial electric griddles and griddle grills

This standard deals with the safety of electrically operated commercial griddles and griddle grills, their rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances. These appliances are not intended for household and similar purposes. They are used for commercial processing of food in areas not open to the public, for example in kitchens of restaurants, canteens, hospitals and in commercial enterprises such as bakeries and butcheries. The electrical part of appliances making use of other forms of energy is also within the scope of this standard.

EN 1991-1-2:2024/prA1 Public enquiry
Comment end date 2026-08-06
Eurocode 1 - Actions on structures - Part 1-2: Actions on structures exposed to fire

1.1 Scope of EN 1991 1 2 (1) The methods given in this Eurocode are applicable to buildings and civil engineering works, with a fire load related to the building and its occupancy. (2) EN 1991 1 2 deals with thermal and mechanical actions on structures exposed to fire. It is intended to be used in conjunction with the fire design Parts of EN 1992 to EN 1996 and EN 1999 which give rules for designing structures for fire resistance. (3) EN 1991 1 2 contains thermal actions either nominal or physically based. More data and models for physically based thermal actions are given in annexes. (4) EN 1991 1 2 does not cover the assessment of the damage of a structure after a fire. (5) EN 1991 1 2 does not cover supplementary requirements concerning, for example: - the possible installation and maintenance of sprinkler systems; - conditions on occupancy of building or fire compartment; - the use of approved insulation and coating materials, including their maintenance. 1.2 Assumptions (1) In addition to the general assumptions of EN 1990 the following assumptions apply: - any active and passive fire protection systems taken into account in the design will be adequately maintained; - the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel, or is given by the relevant national regulation.

prEN 18344 Public enquiry
Comment end date 2026-07-07
Execution of special geotechnical works - Artificial ground freezing

This document establishes general principles for the execution, testing and monitoring of Artificial Ground Freezing (AGF) works. AGF is the process of changing the water in the ground from liquid to solid state in a controlled way by artificial means. This document is applicable to: — civil works (tunnels, shafts, retaining walls, plugs, underpinning …) — environmental works (remediation, cut-off walls, …). This document does not apply to: — permafrost — seasonal frost — mining applications.

prEN 1755 Public enquiry
Comment end date 2026-07-16
Industrial trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres

This document is applicable to self-propelled and pedestrian propelled manual and semi-manual industrial trucks as defined in ISO 5053 1:2020 including their load handling devices and attachments (hereafter referred to as trucks) intended for use in potentially explosive atmospheres. NOTE 1 Attachments mounted on the load carrier or on fork arms which are removable by the user are not considered to be a part of the truck. This document specifies supplementary technical requirements for the prevention of the ignition of an explosive atmosphere of flammable gases, vapours, mists or dusts by industrial trucks of equipment group II and equipment category 2G, 3G, 2D or 3D. NOTE 2 The relationship between an equipment category (hereafter referred to as category) and the corresponding zone (area classification) is shown in informative Annex B. This document does not apply to: — trucks of equipment group I; — trucks of equipment group II, equipment category 1; — trucks intended for use in potentially explosive atmospheres with hybrid mixtures; — protective systems. This document does not apply to trucks intended for use in potentially explosive atmospheres of carbon disulfide (CS2), carbon monoxide (CO) and/or ethylene oxide (C2H4O) due to the special properties of these gases. Technical requirements relating to lithium-ion batteries and fuel cells as energy sources are not given in this document due to their specific hazards.

Total records found: 274
arrow-prev 1 2 3 4 5 11 arrow-next

Quick filters

Technical Committee
TK 1 Electronics (8) TK 4 Information technology (8) TK 5 Electrical engineering (32) TK 6 Fruit and vegetables products (2) TK 12 Motor - roads (5) TK 13 Agricultural engineering (6) TK 18 Telecommunications (13) TK 20 Toys, child use articles, sports and other recreational equipment (2) TK 22 Fire safety (4) TK 23 Ceramic tiles, masonry and natural stones (3) TK 24 Quality management and quality assurance (2) TK 28 Gas systems (3) TK 29 Water supply (2) TK 32 Health (12) TK 34 Metrology (2) TK 35 Safety of machinery (3) TK 36 Environmental protection (4) TK 38 Building constructions (27) TK 39 Protection (1) TK 41 Welding (6) TK 42 Packaging (2) TK 43 Railway traffic (2) TK 45 Electric power (11) TK 46 Roofs and building waterproof isolation (1) TK 47 Information and documentation (1) TK 49 Metallic materials (3) TK 50 Heating and Ventilation Systems (1) TK 51 Food analysis- Horizontal methods (2) TK 52 Ophthalmic optics and lasers (4) TK 54 Assistive products for persons with disability (2) TK 57 Fertilizers (1) TK 59 Geotechnics (1) TK 60 Windows and doors (2) TK 63 Gas cylinders and cryogenic vessels (1) TK 66 Non-destructive testing (1) TK 68 Plastics (7) TK 70 Pulp, paper, board, adhesives (4) TK 71 Sustainably produced biomass for energy application, solid biofuel and solid recovered fuel (1) TK 76 Explosive atmospheres (1) TK 79 IT security techniques (10) TK 80 Road transport and traffic telematics (2) TK 82 Safety of trackless overground vehicles (3) TK 86 Geographic information (1) TK 87 Biotechnology (1) TK 88 Building Information Modelling (BIM) (1) TK 89 Risk management and organizational governance (2) TK 99 Health Informatics (2)
ICS
Biologinės dirvožemio savybės (1) Plonasis popierius (1) Advanced ceramics (4) Aircraft and space vehicles in general (1) Alarm and warning systems (1) Aluminium products (1) Application of information technology in general (3) Binders. Sealing materials (4) Biology. Botany. Zoology (1) Bridge construction (1) Building accessories (2) Cans. Tins. Tubes (2) Cement. Gypsum. Lime. Mortar (4) Chemical laboratories. Laboratory equipment (1) Company organization and management in general (1) Concrete and concrete products (1) Concrete structures (2) Cooking ranges, working tables, ovens and similar appliances (12) Dental instruments (1) Dental materials (3) Dishwashers (2) Domestic electrical appliances in general (3) Domestic safety (2) Earth-moving machinery (1) Earthworks. Excavations. Foundation construction. Underground works (2) Electric heaters (2) Electric tools (1) Electric traction equipment (1) Electrical accessories in general (1) Electrical and electronic equipment (2) Electrical apparatus for explosive atmospheres (1) Electricity supply systems (1) Electronics (Vocabularies) (2) Emission (1) Environmental economics. Sustainability (1) Environmental impact assessment (1) Environmental testing (3) Equipment for children (2) Equipment for storage, preparation and distribution of fertilizers (1) Exploratory, drilling and extraction equipment (1) Explosives. Pyrotechnics and fireworks (1) Fire protection (3) Fire-resistance of building materials and elements (1) First aid (3) Fixed capacitors (1) Flat steel products and semi-products (2) Flow in open channels (1) Gas cylinders (1) Gas supply systems (1) Generators (1) Health care services in general (1) High voltage switchgear and controlgear (1) Hospital equipment (1) Identification cards. Chip cards. Biometrics (1) Immunity (2) Implants for surgery, prosthetics and orthotics (1) In vitro diagnostic test systems (3) Indoor sports equipment (1) Industrial robots. Manipulators (1) Industrial trucks (1) Insulating materials in general (3) Iron and steel forgings (1) IT applications in education (1) IT applications in health care technology (2) IT applications in office work (1) IT applications in science (1) IT applications in transport (2) IT Security (12) Management of human resources (1) Management systems (2) Masonry (1) Measurement of electrical and magnetic quantities (5) Mechanical testing of metals (2) Medical equipment in general (1) Metallic coatings (1) Natural gas (2) Non-destructive testing (1) Oilseeds (1) Open systems interconnection in general (1) Optoelectronics. Laser equipment (2) Other lifting equipment (1) Other medical equipment (1) Other semiconductor devices (1) Other services (1) Other standards related to aids for disabled and handicapped people (1) Paint coating equipment (1) Paper and board (3) Passenger cars. Caravans and light trailers (1) Petroleum products and natural gas handling equipment (1) Pipeline components and pipelines in general (1) Plastics in general (1) Plug-and-socket devices. Connectors (2) Pneumatic tools (1) Pollution, pollution control and conservation (1) Potentiometers, variable resistors (1) Power transmission and distribution lines (1) Pressure regulators (1) Properties of surfaces (1) Protection against falling and slipping (1) Quantities and units (1) Radiation measurements (1) Radiation protection (1) Radiographic equipment (1) Railway rolling stock in general (2) Road construction materials (1) Rotating machinery in general (1) Seismic and vibration protection (1) Small kitchen appliances (6) Solar energy engineering (1) Solid fuels (1) Spices and condiments (2) Stationary source emissions (1) Steel pipes and tubes for specific use (1) Sterilization and disinfection in general (1) Street lighting and related equipment (2) Surgical instruments and materials (1) Technical aspects (17) TELECOMMUNICATIONS. AUDIO AND VIDEO ENGINEERING (13) Telecontrol. Telemetering (5) Therapy equipment (1) Thermoplastic materials (4) Timber structures (1) Transport by rail (1) Valves in general (2) Ventilation and air-conditioning systems (1) Ventilators. Fans. Air-conditioners (1) Water heating equipment (1) Waxes, bituminous materials and other petroleum products (2) Welded joints and welds (3) Welding, brazing and soldering in general (1) Woodworking machines (3) Writing and transliteration (1)