GB/T 21974-2024 Chinese PDF (GB/T21974-2024) GB/T 1149.11-2023 4-2023_Chinese: Petroleum and natural gas

4-2023_Chinese: Petroleum and natural gas industries - Glass-reinforced plastics (GRP) piping - Part 4: Fabrication

English versions: GB 31604

39-2025_Chinese: Requirements of the greenhouse gas emissions accounting and reporting - Part 39: Calcined gypsum enterprises (Chinese: 温室气体排放核算与报告要求 第39部分：建筑石膏生产企业)

supplied electronic control gear for fluorescent lamps (Chinese: 光源控制装置 第2-3部分：荧光灯用交流和/或直流电子控制装置的特殊要求)

GB/T 45237-2025_Chinese: Dangerous goods - Test method of vent sizing for vessel of self-reactive substances and organic peroxides (Chinese: 危险货物 自反应物质和有机过氧化物容器排气孔尺寸确定的试验方法)

GB/T 21974-2024 Chinese PDF (GB/T21974-2024) GB/T 1149.11-2023 4-2023_Chinese: Petroleum and natural gasGB T 21974 2024_Chinese: YZRW series eddy current braking wound rotor three phase induction motors for crane and metallurgical applications Technical specification (frame size 112315) (Chinese: YZRW 112315) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21974 2024