Home / Standards / GB/T 3228 GB/T 3228 Active Assembly tools for screws and nuts—Dimensions of machine-operated “impact” square drive sockets 螺栓螺母用装配工具 冲击式机动四方传动套筒的尺寸 Standard Type GBT ICS 25.140.10 CCS J48 Status 现行 Issue Date 2022-12-30 Implementation 2023-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会