Home / Standards / GB/T 21457-2008 GB/T 21457-2008 Active Cranes and related equipment - Accuracy requirements for measuring parameters during testing 起重机和相关设备 试验中参数的测量精度要求 Standard Type GBT ICS 53.020.20 CCS J80 Status 现行 Issue Date 2008-02-21 Implementation 2008-08-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会