资质认证
- ISO 3974:1977
- Definitions of living animals for slaughter — Ovines
- 1977-01-31
- ISO 2975-6:1977
- Measurement of water flow in closed conduits — Tracer methods — Part 6: Transit time method using non-radioactive tracers
- 1977-01-31
- ISO 4314:1977
- Surface active agents — Determination of free alkalinity or free acidity — Titrimetric method
- 1977-01-31
- ISO 5086:1977
- Textile floor coverings — Hand-knotted carpets — Sampling and selection of areas of test
- 1977-01-31
- IEC 60067D:1977
- Fourth supplement - Dimensions of electronic tubes and valves
- 1976-12-31
- IEC 60231G:1977
- Seventh supplement: Liquid-metal cooled fast reactors
- 1976-12-31
- IEC 60169-11:1977
- Radio-frequency connectors. Part 11: R.F. coaxial connectors with inner diameter of outer conductor 9.5 mm (0.374 in) with screw coupling - Characteristic impedance 50 ohms (Type 4.1/9.5)
- 1976-12-31
- IEC 60231F:1977
- Sixth supplement: Steam generating, direct cycle, heavy-water moderated reactors
- 1976-12-31
- IEC 60554-1:1977
- Specification for cellulosic papers for electrical purposes. Part 1: Definitions and general requirements
- 1976-12-31
- IEC 60231E:1977
- Fifth supplement: Principles of instrumentation of high temperature indirect cycle gas-cooled power reactors (HTGR)
- 1976-12-31
- IEC 60061-3G:1977
- Seventh supplement - Lamp caps and holders together with gauges for the control of interchangeability and safety. Part 3: Gauges
- 1976-12-31
- IEC 60061-2E:1977
- Fifth supplement - Lamp caps and holders together with gauges for the control of interchangeability and safety. Part 2: Lampholders
- 1976-12-31
- IEC 60496:1975/AMD1:1977
- Amendment 1 - Methods for measuring the performance of electric warming plates for household and similar purposes
- 1976-12-31
- IEC 60590:1977
- Determination of the aromatic hydrocarbon content of new mineral insulating oils
- 1976-12-31
- IEC 60589:1977
- Methods of test for the determination of ionic impurities in electrical insulating materials by extraction with liquids
- 1976-12-31
- IEC 60061-1H:1977
- Eighth supplement - Lamp caps and holders together with gauges for the control of interchangeability and safety. Part 1: Lamp caps
- 1976-12-31
- IEC 60061-1G:1977
- Seventh supplement - Lamp caps and holders together with gauges for the control of interchangeability and safety. Part 1: Lamp caps
- 1976-12-31
- IEC 60588-3:1977
- Askarels for transformers and capacitors. Part 3: Specifications for new askarels
- 1976-12-31
- IEC 60377-2:1977
- Methods for the determination of the dielectric properties of insulating materials at frequencies above 300 MHz. Part 2: Resonance methods
- 1976-12-31
- IEC 60581-1:1977
- High fidelity audio equipment and systems: Minimum performance requirements. Part 1: General
- 1976-12-31
