Home / Standards / GB/T 31050-2014 GB/T 31050-2014 Active Energy efficiency test methods for metallurgy cranes 冶金起重机能效测试方法 Standard Type GBT ICS 53.020.20 CCS J80 Status 现行 Issue Date 2014-12-22 Implementation 2015-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A