资质认证
- IEC 60738-1:1982
- Directly heated positive step-function temperature coefficient thermistors. Part 1: Generic specification
- 1981-12-31
- IEC 60263:1982
- Scales and sizes for plotting frequency characteristics and polar diagrams
- 1981-12-31
- IEC 60115-4:1982
- Fixed resistors for use in electronic equipment. Part 4: Sectional specification: Fixed power resistors
- 1981-12-31
- IEC 60154-1:1982
- Flanges for waveguides. Part 1: General requirements
- 1981-12-31
- IEC 60667-2:1982
- Specification for vulcanized fibre for electrical purposes. Part 2: Methods of test
- 1981-12-31
- IEC 60404-7:1982
- Magnetic materials. Part 7: Method of measurement of the coercivity of magnetic materials in an open magnetic circuit
- 1981-12-31
- IEC 60384-15:1982
- Fixed capacitors for use in electronic equipment. Part 15: Sectional specification: Fixed tantalum capacitors with non-solid or solid electrolyte
- 1981-12-31
- IEC 60050-726:1982
- International Electrotechnical Vocabulary. Transmission lines and waveguides
- 1981-12-31
- IEC 60335-2-35:1982
- Safety of household and similar electrical appliances - Part 2: Particular requirements for instantaneous water heaters
- 1981-12-31
- ISO 272:1982
- Fasteners — Hexagon products — Widths across flats
- 1981-12-31
- ISO 5282:1982
- Aromatic hydrocarbons — Determination of sulphur content — Pitt-Ruprecht reduction and spectrophotometric method
- 1981-12-31
- ISO 6704:1982
- Automatic steam traps — Classification
- 1981-12-31
- ISO 1388-4:1981
- Ethanol for industrial use — Methods of test — Part 4: Estimation of content of carbonyl compounds present in moderate amounts — Titrimetric method
- 1981-11-30
- ISO 2016:1981
- Capillary solder fittings for copper tubes — Assembly dimensions and tests
- 1981-11-30
- ISO 4194:1981
- Magnesium alloys — Determination of zinc content — Flame atomic absorption spectrometric method
- 1981-11-30
- ISO 4193:1981
- Aluminium and aluminium alloys — Determination of chromium content — Flame atomic absorption spectrometric method
- 1981-11-30
- ISO 3952-1:1981
- Kinematic diagrams — Graphical symbols
- 1981-11-30
- ISO 4470:1981
- Sawn timber — Determination of the average moisture content of a lot
- 1981-11-30
- ISO 5377:1981
- Starch hydrolysis products — Determination of reducing power and dextrose equivalent — Lane and Eynon constant titre method
- 1981-11-30
- ISO 619:1981
- Manganese ores — Determination of chromium content — Diphenylcarbazide photometric method and silver persulphate titrimetric method
- 1981-11-30
