Home / Standards / GB/T 4440 GB/T 4440 Active Adjustable wrenches 活扳手 Standard Type GBT ICS 25.140.30 CCS J47 Status 现行 Issue Date 2022-11-08 Implementation 2023-06-01 Responsible Dept 中国轻工业联合会 Drafting Unit 中国轻工业联合会