GB/T 20228-2021
砷化镓单晶
Gallium arsenide single crystal
- 实施日期
- 2021-12-01
- ICS 分类
- 29.045
组合使用关键词、标准类型、状态与 ICS 分类,快速定位所需国家标准。
找到 4,341 条
GB/T 20228-2021
Gallium arsenide single crystal
GB/T 19216.3-2021
Circuit integrity test for electric cables or optical fiber cables under fire conditions—Part 3: Test method for fire with shock at a temperature of at least 830 ℃ for cables of rated voltage up to and including 0.6/1 kV tested in a metal enclosure
GB/T 19216.2-2021
Circuit integrity test for electric cables or optical fiber cables under fire conditions—Part 2: Test method for fire with shock at a temperature of at least 830 ℃ for cables of rated voltage up to and including 0.6/1 kV and with an overall diameter not
GB/T 19216.1-2021
Circuit integrity test for electric cables or optical fiber cables under fire conditions—Part 1: Test method for fire with shock at a temperature of at least 830 ℃ for cables of rated voltage up to and including 0.6/1 kV and with an overall diameter excee
GB/T 8897.3-2021
Primary batteries—Part 3: Watch batteries
GB/T 8897.2-2021
Primary batteries—Part 2:Physical and electrical specifications
GB/T 8897.1-2021
Primary batteries—Part 1:General
GB/T 1029-2021
Test procedures for three-phase synchronous machines
GB/T 40091-2021
Requirements for safety measures of relaying protection and security automatic equipment in smart substation
GB/T 17651.2-2021
Measurement of smoke density of cables or optical fiber cables burning under defined conditions—Part 2: Test procedure and requirements
GB/T 17651.1-2021
Measurement of smoke density of cables or optical fiber cables burning under defined conditions—Part 1: Test apparatus
GB/T 17650.2-2021
Test on gases evolved during combustion of materials from cables or optical fiber cables—Part 2: Determination of acidity (by pH measurement) and conductivity
GB/T 17650.1-2021
Test on gases evolved during combustion of materials from cables or optical fiber cables—Part 1:Determination of the halogen acid gas content
GB/T 16895.32-2021
Low voltage electrical installations—Part 7-712: Requirements for special installations or locations—Solar photovoltaic (PV) power supply systems
GB/T 12786-2021
General technical conditions for automatic internal combustion engine power stations
GB 40165-2021
Lithium ion cells and batteries used in stationary electronic equipments—Safety technical specification
GB 24427-2021
Content limitation of mercury, cadmium and lead for zinc anode primary battery
GB/Z 35031.8-2021
Customer energy management system—Part 8: Use cases
GB/Z 39942-2021
Application of GB/T 20145 for the assessment of blue light hazard to light sources and luminaires
GB/T 39943-2021
Performance requirements for LED lighting chains