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ISO 3011 2021 Rubber- or plastics-coated fabrics — Determination of resistance to ozone cracking under static conditions.pdf
ISO 3055 2021 Kitchen equipment — Coordinating sizes.pdf
ISO 3381 2021 Railway applications — Acoustics — Noise measurement inside railbound.pdf
ISO 3533 2021 Sex toys — Design and safety requirements for products in direct contact with genitalia, the anus, or both.pdf
ISO 37000 2021 Governance of organizations — Guidance.pdf
ISO 37106 2021 Sustainable cities and communities — Guidance on establishing smart city operating models for sustainable communities.pdf
ISO 37167 2021 Smart community infrastructures — Smart transportation for energy saving operation by intentionally driving slowly.pdf
ISO 37180 2021 Smart community infrastructures — Guidance on smart transportation with QR code identification and authentification in transportation and its related or additional services.pdf
ISO 3739-3 2021 Industrial tyres and rims — Part 3 Rims.pdf
ISO 3911 2021 Wheels and rims for pneumatic tyres — Vocabulary, designation and marking.pdf
ISO 4000-2 2021 Passenger car tyres and rims — Part 2 Rims.pdf
ISO 4138 2021 Passenger cars — Steady-state circular driving behaviour — Open-loop test.pdf
ISO 42500 2021 Sharing economy — General principles.pdf
ISO 4259-4 2021 Petroleum and related products — Precision of measurement methods and results — Part 4 Use of statistical control charts to validate 'in-statistical.pdf
ISO 4426 2021 Intelligent transport systems — Lower layer protocols for usage in the European digital tachograph.pdf
ISO 4568 2021 Ships and marine technology — Sea-going vessels — Windlasses and anchor capstans.pdf
ISO 4580 2021 Aerospace — Drives, internal, TORX？ PARALOBE？ driver bit — Geometrical definition, gaging and technical requirements.pdf
ISO 4674-2 2021 Rubber- or plastics-coated fabrics — Determination of tear resistance — Part 2 Ballistic pendulum method.pdf
ISO 4779 2021 Chain components for lifting purposes — Forged eye hook with point and latch — Grade 4, stainless steel, solution annealed.pdf
ISO 4803 2021 Laboratory glassware — Borosilicate glass tubing.pdf
ISO 50005 2021 Energy management systems — Guidelines for a phased implementation.pdf
ISO 5071-1 2021 Brown coals and lignites — Determination of the volatile matter in the analysis sample — Part 1 Two-furnace method.pdf
ISO 5093 2021 Essential oil of lemon myrtle (Backhousia citriodora F. Muell.), citral type.pdf
ISO 5116-2 2021 Improving transparency in financial and business reporting — Harmonization topics — Part 2 Guidelines for data point modelling.pdf
ISO 5224 2021 Rotorcrafts – Flight dynamics – Vocabulary.pdf
ISO 5287 2021 Belt drives — V-belts for the automotive industry — Fatigue test.pdf
ISO 56006 2021 Innovation management — Tools and methods for strategic intelligence management — Guidance.pdf
ISO 5675 2021 Agricultural tractors and machinery — General purpose quick-action hydraulic couplers.pdf
ISO 5743 2021 Pliers and nippers — General technical requirements.pdf
ISO 5752 2021 Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions.pdf
ISO 6079 2021 Instant tea in solid form — Specification.pdf
ISO 6195 2021 Fluid power systems and components — Cylinder-rod wiper-ring housings in reciprocating applications — Dimensions and tolerances.pdf
ISO 6344-2 2021 Coated abrasives — Determination and designation of grain size distribution — Part 2 Macrogrit sizes P12 to P220.pdf
ISO 6368 2021 Petroleum, petrochemical and natural gas industries — Dry gas sealing systems for axial, centrifugal, and rotary screw compressors and expanders.pdf
ISO 6469-3 2021 Electrically propelled road vehicles — Safety specifications — Part 3 Electrical safety.pdf
ISO 6505 2021 Rubber, vulcanized or thermoplastic — Determination of tendency to adhere to and corrode metals.pdf
ISO 6588-1 2021 Paper, board and pulps — Determination of pH of aqueous extracts — Part 1 Cold extraction.pdf
ISO 6621-3 2021 Internal combustion engines — Piston rings — Part 3 Material specifications.pdf
ISO 6689 2021 Equipment for harvesting — Combine harvesters and functional components — Vocabulary.pdf
ISO 6717 2021 In vitro diagnostic medical devices — Single-use containers for the collection of specimens from humans other than blood.pdf
ISO 6877 2021 Dentistry — Endodontic obturating materials.pdf
ISO 7213 2021 Pulps — Sampling for testing.pdf
ISO 7299-2 2021 Diesel engines — End-mounting flanges for pumps — Part 2 High-pressure supply pumps for common rail fuel injection systems.pdf
ISO 7539-9 2021 Corrosion of metals and alloys — Stress corrosion testing — Part 9 Preparation and use of pre-cracked specimens for tests under rising load or rising displacement.pdf
ISO 7711-1 2021 Dentistry — Diamond rotary instruments — Part 1 General requirements.pdf
ISO 7788 2021 Steel — Surface finish of hot-rolled plates and wide flats — Delivery requirements.pdf
ISO 7870-4 2021 Control charts — Part 4 Cumulative sum charts.pdf
ISO 788 2021 Ultramarine pigments.pdf
ISO 8000-110 2021 Data quality — Part 110 Master data Exchange of characteristic data Syntax, semantic encoding, and.pdf
ISO 8100-34 2021 Lifts for the transport of persons and goods — Part 34 Measurement of lift ride quality.pdf
ISO 8130-2 2021 Coating powders — Part 2 Determination of density by gas comparison pycnometer (referee method).pdf
ISO 8130-4 2021 Coating powders — Part 4 Calculation of lower explosion limit.pdf
ISO 8130-6 2021 Coating powders — Part 6 Determination of gel time of thermosetting coating powders at a given temperat.pdf
ISO 8153-2 2021 Aerospace fluid systems and components — Vocabulary — Part 2 Fittings and couplings.pdf
ISO 8210 2021 Equipment for harvesting — Combine harvesters — Test procedure and performance assessment.pdf
ISO 8466-1 2021 Water quality — Calibration and evaluation of analytical methods — Part 1 Linear calibration function.pdf
ISO 8611-1 2021 Pallets for materials handling — Flat pallets — Part 1 Test methods.pdf
ISO 8840 2021 Refractory materials — Determination of bulk density of granular materials.pdf
ISO 8893 2021 Forestry machinery — Portable brush-cutters and grass-trimmers — Engine performance and fuel consumption.pdf
ISO 8996 2021 Ergonomics of the thermal environment — Determination of metabolic rate.pdf
ISO 9211-7 2021 Optics and photonics — Optical coatings — Part 7 Minimum requirements for neutral beam splitter coatings.pdf
ISO 9241-20 2021 Ergonomics of human-system interaction — Part 20 An ergonomic approach to accessibility within the ISO 9241 series.pdf
ISO 9343 2021 Pliers and nippers — Slip joint pliers — Dimensions and test values.pdf
ISO 965-3 2021 ISO general purpose metric screw threads — Tolerances — Part 3 Limit deviations for screw threads.pdf
ISO 975 2021 Brown coals and lignites — Determination of yield of benzene-soluble extract — Semi-automatic method.pdf
ISO 9982 2021 Belt drives — Pulleys and V-ribbed belts for industrial applications — PH, PJ, PK, PL and PM profiles dimensions.pdf
ISO ASTM 52900 2021 Additive manufacturing — General principles — Fundamentals and vocabulary.pdf
ISO IEC 11160-2 2021 Office equipment — Minimum information to be included in specification sheets — Part 2 Class 3 and Class 4 printers.pdf
ISO IEC 15444-5 2021 Information technology — JPEG 2000 image coding system — Part 5 Reference software.pdf
ISO IEC 15961-1 2021 Information technology — Data protocol for radio frequency id.pdf
ISO IEC 18013-5 2021 Personal identification — ISO-compliant driving licence — Part 5 Mobile driving licence (mDL) application.pdf
ISO IEC 18181-2 2021 Information technology — JPEG XL image coding system — Part 2 File format.pdf
ISO IEC 19075-3 2021 Information technology — Guidance for the use of database language SQL — Part 3 SQL embedded in programs using the JavaTM programming language.pdf
ISO IEC 19075-5 2021 Information technology — Guidance for the use of database language SQL — Part 5 Row pattern recognition.pdf
ISO IEC 19763-16 2021 Information technology — Metamodel framework for interoperability (MFI) — Part 16 Metamodel for document model registration.pdf
ISO IEC 19794-7 2021 Information technology — Biometric data interchange formats — Part 7 Signature sign time series data.pdf
ISO IEC 21472 2021 Information technology — Scenario evaluation methodology for user interaction influence in biometric system performance.pdf
ISO IEC 21823-3 2021 Internet of things (IoT) — Interoperability for IoT systems — Part 3 Semantic interoperability.pdf
ISO IEC 21838-2 2021 Information technology — Top-level ontologies (TLO) — Part 2 Basic Formal Ontology (BFO).pdf
ISO IEC 22237-4 2021 Information technology — Data centre facilities and infrastructures — Part 4 Environmental control.pdf
ISO IEC 23001-16 2021 Information technology — MPEG systems technologies — Part 16 Derived visual tracks in the ISO base media file format.pdf
ISO IEC 23090-6 2021 Information technology — Coded representation of immersive media — Part 6 Immersive media metrics.pdf
ISO IEC 23094-2 2021 Information technology – General video coding — Part 2 Low complexity enhancement video coding.pdf
ISO IEC 23360-1-1 2021 Linux Standard Base (LSB) — Part 1-1 Common definitions.pdf
ISO IEC 23510 2021 Information technology — 3D printing and scanning — Framework for an Additive Manufacturing Service Platform (AMSP).pdf
ISO IEC 27013 2021 Information security, cybersecurity and privacy protection — Guidance on the integrated implementation of ISO IEC 27001 and ISO EC 20000-1.pdf
ISO IEC 27070 2021 Information technology — Security techniques — Requirements for establishing virtualized roots of trust.pdf
ISO IEC 27555 2021 Information security, cybersecurity and privacy protection — Guidelines on personally identifiable information deletion.pdf
ISO IEC 29142-1 2021 Information technology — Print cartridge characterization — Part 1 General terms, symbols, notations and cartridge characterization framework.pdf
ISO IEC 30118-11 2021 Information technology – Open Connectivity Foundation (OCF) Specification — Part 11 Device to cloud services specification.pdf
ISO IEC 30118-13 2021 Information technology – Open Connectivity Foundation (OCF) Specification — Part 13 Onboarding tool specification.pdf
ISO IEC 30118-15 2021 Information technology – Open Connectivity Foundation (OCF) Specification — Part 15 OCF resource to EnOcean mapping specification.pdf
ISO IEC 30118-17 2021 Information technology – Open Connectivity Foundation (OCF) Specification — Part 17 OCF resource to Zigbee cluster mapping specification.pdf
ISO IEC 30118-3 2021 Information technology — Open Connectivity Foundation (OCF) Specification — Part 3 Bridging specification.pdf
ISO IEC 30118-5 2021 Information technology — Open Connectivity Foundation (OCF) Specification — Part 5 OCF device specification.pdf
ISO IEC 30118-7 2021 Information Technology – Open Connectivity Foundation (OCF) Specification — Part 7 Wi-Fi easy setup specification.pdf
ISO IEC 30118-9 2021 Information technology – Open Connectivity Foundation (OCF) Specification — Part 9 Core optional specification.pdf
ISO IEC 30137-4 2021 Information technology — Use of biometrics in video surveillance systems — Part 4 Ground truth and video annotation procedure.pdf
ISO IEC 30165 2021 Internet of Things (IoT) — Real-time IoT framework.pdf
ISO IEC 39794-9 2021 Information technology — Extensible biometric data interchange formats — Part 9 Vascular image data.pdf
ISO IEC 8824-2 2021 Information technology — Abstract Syntax Notation One (ASN.1) — Part 2 Information object specification.pdf
ISO IEC 8824-4 2021 Information technology — Abstract Syntax Notation One (ASN.1) — Part 4 Parameterization of ASN.1 specifications.pdf
ISO IEC 8825-2 2021 Information technology — ASN.1 encoding rules — Part 2 Specification of Packed Encoding Rules (PER).pdf
ISO IEC 8825-4 2021 Information technology — ASN.1 encoding rules — Part 4 XML Encoding Rules (XER).pdf
ISO IEC 8825-6 2021 Information technology — ASN.1 encoding rules — Part 6 Registration and application of PER encoding instructions.pdf
ISO IEC 8825-8 2021 Information technology — ASN.1 encoding rules — Part 8 Specification of JavaScript Object Notation Encoding Rules (JER).pdf
ISO IEC TR 22116 2021 Information technology — A study of the differential impact of demographic factors in biometric recognition system performance.pdf
ISO IEC TR 24372 2021 Information technology — Artificial intelligence (AI) — Overview of computational approaches for AI systems.pdf
ISO IEC TR 29119-6 2021 Software and systems engineering — Software testing — Part 6 Guidelines for the use of ISO IEC IEEE 29119 (all parts) in agile projects.pdf
ISO IEC TR 30167 2021 Internet of Things (IoT) — Underwater communication techno.pdf
ISO IEC TR 30176 2021 Internet of Things (IoT) —- Integration of IoT and DLT blockch.pdf
ISO IEC TS 20000-11 2021 Information technology — Service management — Part 11 Guidance on the relationship between ISO IEC 20000-1 and service management frameworks ITIL？.pdf
ISO IEC TS 23532-2 2021 Information security, cybersecurity and privacy protection — Requirements for the competence of IT security testing and evaluation laboratories — Part 2 Testing for ISO IEC 19790.pdf
ISO IEC TS 38505-3 2021 Information technology — Governance of data — Part 3 Guidelines for data classification.pdf
ISO PAS 5101 2021 Road vehicles — Field load specification for brake actuation and modulation systems.pdf
ISO TR 10657 2021 Explanatory notes on ISO 76.pdf
ISO TR 16158 2021 Space systems — Avoiding collisions among orbiting objects.pdf
ISO TR 17400 2021 Space systems — Space launch complexes, integration sites and other facilities — General testing guidelines.pdf
ISO TR 18228-3 2021 Design using geosynthetics — Part 3 Filtration.pdf
ISO TR 20078-4 2021 Road vehicles — Extended vehicle (ExVe) web services — Part 4.pdf
ISO TR 20413 2021 Fire safety engineering — Survey of performance-based fire safety design practices in different countries.pdf
ISO TR 21934-1 2021 Road vehicles — Prospective safety performance assessment of pre-crash technology by virtual simulation — Part 1 State-of-the-art and general method overview.pdf
ISO TR 22639 2021 Space systems — Design guidelines for multi-geo spacecraft collocation.pdf
ISO TR 23173 2021 Surface chemical analysis — Electron spectroscopies — Measurement of the thickness and composition of nanoparticle coatings.pdf
ISO TR 23750 2021 Cosmetics — Answers to frequently asked questions on ingredients and product characterization according to ISO 16128-1 and ISO 16128-2.pdf
ISO TR 27877 2021 Statistical analysis for evaluating the precision of binary measurement methods and their results.pdf
ISO TR 32220 2021 Sustainable finance — Basic concepts and key initiatives.pdf
ISO TR 4445 2021 Intelligent transport systems — Mobility integration — Role model of ITS service application in smart cities.pdf
ISO TR 52120-2 2021 Energy performance of buildings — Contribution of building automation, controls and building management — Part 2 Explanation and justification of ISO 52120-1.pdf
ISO TR 5729 2021 Evaluation of physical parameters of filter paper substrates for the determination of the ignition propensity of cigarettes.pdf
ISO TS 10986 2021 Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — System design of above ground pipe and joint installations without end thrust.pdf
ISO TS 13399-2 2021 Cutting tool data representation and exchange — Part 2 Reference dictionary for the cutting items.pdf
ISO TS 13399-4 2021 Cutting tool data representation and exchange — Part 4 Reference dictionary for adaptive items.pdf
ISO TS 16095 2021 Reclaimed rubber derived from products containing mainly natural rubber — Evaluation procedure.pdf
ISO TS 17420-9 2021 Respiratory protective devices — Performance requirements — Part 9 Special application chemical, biological, radiological and nuclear (CBRN) supplied breathable RPD.pdf
ISO TS 18950 2021 Imaging materials —Photographic prints — Effect of light sources on degradation under museum conditions.pdf
ISO TS 19807-2 2021 Nanotechnologies — Magnetic nanomaterials — Part 2 Specification of characteristics and measurement methods for nanostructured magnetic beads for nucleic acid extraction.pdf
ISO TS 20388 2021 Biotechnology — Biobanking — Requirements for animal biological material.pdf
ISO TS 21002 2021 Road vehicles — Multidimensional measurement and coordinate.pdf
ISO TS 21596 2021 Solid biofuels — Determination of grindability — Hardgrove type method for thermally treated biomass fuels.pdf
ISO TS 21815-2 2021 Earth-moving machinery — Collision warning and avoidance — Part 2 On-board J1939 communication interface.pdf
ISO TS 22115 2021 Animal and vegetable fats and oils — Separation of lipid classes by capillary gas chromatography (fingerprint method).pdf
ISO TS 22318 2021 Security and resilience — Business continuity management systems — Guidelines for supply chain continuity management.pdf
ISO TS 22690 2021 Genomics informatics — Reliability assessment criteria for high-throughput gene-expression data.pdf
ISO TS 22984 2021 Transport packaging — Cleaning and sanitation methods of reusable transport items for distribution purpose.pdf
ISO TS 23105 2021 Biotechnology — Biobanking — Requirements for the biobanking of plant biological material for research and development.pdf
ISO TS 23258 2021 Blockchain and distributed ledger technologies — Taxonomy and Ontology.pdf
ISO TS 23565 2021 Biotechnology — Bioprocessing — General requirements and considerations for equipment systems used in the manufacturing of cells for therapeutic use.pdf
ISO TS 23758 2021 Guidelines for the validation of qualitative screening methods for the detection of residues of veterinary drugs in milk and milk products.pdf
ISO TS 23818-2 2021 Assessment of conformity of plastics piping systems for the rehabilitation of existing pipelines — Part 2 Resin-fibre composite (RFC) material.pdf
ISO TS 24289 2021 Health informatics — Hierarchical file structure specification for secondary storage of health-related information.pdf
ISO TS 29843-2 2021 Soil quality — Determination of soil microbial diversity — Part 2 Method by phospholipid fatty acid analysis (PLFA) using the simple PLFA extraction method.pdf
ISO TS 6521-2 2021 Lubricants, industrial oils and related products (Class L) — Family D (Compressors) — Part 2 Specifications of categories DAG, DAH and DAJ (Lubricants for flooded rotary air compressors).pdf
ISO TS 9241-430 2021 Ergonomics of human-system interaction — Part 430 Recommendations for the design of non-touch gestural input for the reduction of biomechanical stress.pdf
ISO 10013 2021 Quality management systems — Guidance for documented information.pdf
ISO 10074 2021 Anodizing of aluminium and its alloys — Specification for hard anodic oxidation coatings on aluminium and its alloys.pdf
ISO 10140-3 2021 Acoustics — Laboratory measurement of sound insulation of building elements — Part 3 Measurement of impact sound insulation.pdf
ISO 10140-5 2021 Acoustics — Laboratory measurement of sound insulation of building elements — Part 5 Requirements for test facilities and equipment.pdf
ISO 10241-2 2012Terminological entries in standardsPart 2 Adoption of standardized terminological entries.pdf
ISO 10315 2021 Cigarettes — Determination of nicotine in total particulate matter from the mainstream smoke — Gas-chromatographic method.pdf
ISO 10545-15 2021 Ceramic tiles — Part 15 Determination of lead and cadmium given off by til.pdf
ISO 10845-2 2020 Construction procurement — Part 2 Formatting and compilation of procurement documentation.pdf
ISO 10962 2021 Securities and related financial instruments — Classification of financial instruments (CFI) code.pdf
ISO 10993-23 2021 Biological evaluation of medical devices — Part 23 Tests for irritation.pdf
ISO 11199-1 2021 Assistive products for walking manipulated by both arms — Requirements and test methods — Part 1 Walking frames.pdf
ISO 11357-4 2021 Plastics — Differential scanning calorimetry (DSC) — Part 4 Determination of specific heat capacity.pdf
ISO 1140 2021 Fibre ropes — Polyamide — 3-, 4-, 8- and 12-strand ropes.pdf
ISO 11410 2021 Leather — Guidelines for packaging of wet blue leather.pdf
ISO 11839 2021 Machinery for forestry — Thrown object guard — Test method and performance criteria.pdf
ISO 11943 2021 Hydraulic fluid power — Online automatic particle-counting systems for liquids — Methods of calibration and validation.pdf
ISO 12003-2 2021 Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors — Part 2 Rear-mounted ROPS.pdf
ISO 12133 2021 Small craft — Carbon monoxide (CO) detection systems and alarms.pdf
ISO 12219-10 2021 Interior air of road vehicles — Part 10 Whole vehicle test chamber — Specification and methods for the determination of volatile organic compounds in cabin interiors — Trucks and buses.pdf
ISO 12614-1 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 1 General requirements and definitions.pdf
ISO 12614-12 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 12 Rigid fuel line in copper and its alloys.pdf
ISO 12614-14 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 14 Differential pressure fuel content gauge.pdf
ISO 12614-16 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 16 Heat exchanger-vaporizer.pdf
ISO 12614-18 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 18 Gas temperature sensor.pdf
ISO 12614-3 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 3 Check valve.pdf
ISO 12614-5 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 5 Tank pressure gauge.pdf
ISO 12614-8 2021 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 8 Excess flow valve.pdf
ISO 12625-17 2021 Tissue paper and tissue products — Part 17 Determination of disintegration in water.pdf
ISO 12647-8 2021 Graphic technology — Process control for the production of half-tone colour separations, proof and production prints — Part 8 Validation print processes working directly from digital data.pdf
ISO 12742 2020 Copper, lead and zinc sulfide concentrates — Determination of transportable moisture limits — Flow-table method.pdf
ISO 13044-2 2021 Road vehicles — Fully automatic coupling systems 24 V (FACS) for heavy commercial vehicle combinations — Part 2 Electrical and pneumatic interface for 50 mm fifth wheel couplings.pdf
ISO 13142 2021 Optics and photonics — Lasers and laser-related equipment — Cavity ring-down method for high-reflectance and high-transmittance measurements.pdf
ISO 13256-1 2021 Water-source heat pumps — Testing and rating for performance — Part 1 Water-to-air and brine-to-air heat pumps.pdf
ISO 13297 2020 Small craft — Electrical systems — Alternating and direct current installations.pdf
ISO 1346 2021 Fibre ropes — Polypropylene split film, monofilament and multifilament (PP2) and polypropylene high-tenacity multifilament (PP3) — 3-, 4-, 8- and 12-strand ropes.pdf
ISO 13736 2021 Determination of flash point — Abel closed-cup method.pdf
ISO 14009 2020 Environmental management systems — Guidelines for incorporating material circulation in design and development.pdf
ISO 14031 2021 Environmental management — Environmental performance evaluation — Guidelines.pdf
ISO 14091 2021 Adaptation to climate change — Guidelines on vulnerability, impacts and risk assessment.pdf
ISO 14200 2021 Space environment (natural and artificial) — Process-based implementation of meteoroid and debris environment models (orbital altitudes below GEO + 2 000 km).pdf
ISO 14490-5 2021 Optics and photonics — Test methods for telescopic systems — Part 5 Test methods for transmittance.pdf
ISO 14557 2021 Fire-fighting hoses — Rubber and plastics suction hoses and hose assemblies.pdf
ISO 14632 2021 Extruded sheets of polyethylene (PE-HD) — Requirements and test methods.pdf
ISO 14907-2 2021 Electronic fee collection — Test procedures for user and fixed equipment — Part 2 Conformance test for the on-board unit application interface.pdf
ISO 14945 2021 Small craft — Builder's plate.pdf
ISO 15245-1 2021 Gas cylinders — Parallel threads for connection of valves to gas cylinders — Part 1 Specification.pdf