- 标准号
- 标准名称
- 发布日期
- ISO 8648:1988/COR1:1991
- Corrigendum 1 - Information processing systems - Open Systems Interconnection - Internal organization of the Network Layer
- 1991-03-13
- ISO 296:1991
- Machine tools — Self-holding tapers for tool shanks
- 1991-03-13
- ISO 8648:1988/Cor 1:1991
- Information processing systems — Open Systems Interconnection — Internal organization of the Network Layer — Technical Corrigendum 1
- 1991-03-13
- ISO 9192:1991
- Lawn and garden ride-on (riding) tractors — One-point tubular sleeve hitch
- 1991-03-13
- ISO 6654:1991
- Animal feeding stuffs — Determination of urea content
- 1991-03-13
- IEC 60268-10:1991
- Sound system equipment - Part 10: Peak programme level meters
- 1991-03-12
- IEC 61053-1:1991
- Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type Beta format - FM audio recording - Part 1: 625 line-50 field systems
- 1991-03-12
- IEC 61053-2:1991
- Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type Beta format - FM audio recording - Part 2: 525 line-60 field systems
- 1991-03-12
- IEC 61053-1:1991
- Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type Beta format - FM audio recording - Part 1: 625 line-50 field systems
- 1991-03-12
- ISO 9191:1991
- Lawn and garden ride-on (riding) tractors — Three-point hitch
- 1991-03-06
- IEC 60068-3-3:1991
- Environmental testing - Part 3-3: Guidance - Seismic test methods for equipments
- 1991-02-27
- ISO 4200:1991
- Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit length
- 1991-02-20
- IEC 60994:1991
- Guide for field measurement of vibrations and pulsations in hydraulic machines (turbines, storage pumps and pump-turbines)
- 1991-02-14
- IEC TR 60034-16-2:1991
- Rotating electrical machines - Part 16: Excitation systems for synchronous machines - Chapter 2: Models for power system studies
- 1991-02-14
- IEC 61051-2-2:1991
- Varistors for use in electronic equipment - Part 2: Blank detail specification for zinc oxide surge suppression varistors. Assessment level E
- 1991-02-10
- IEC 61051-2:1991
- Varistors for use in electronic equipment - Part 2: Sectional specification for surge suppression varistors
- 1991-02-10
- ISO 5252:1991
- Steel tubes — Tolerance systems
- 1991-02-06
- IEC 60072-1:1991
- Dimensions and output series for rotating electrical machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
- 1991-01-31
- ISO 723:1991
- Rock drilling equipment — Forged collared shanks and corresponding chuck bushings for hollow hexagonal drill steels
- 1991-01-23
- ISO 8224-2:1991
- Traveller irrigation machines — Part 2: Softwall hose and couplings — Test methods
- 1991-01-23

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