Home / Standards / GB/T 37904-2019 GB/T 37904-2019 Active Earth-moving machinery—Walking hydraulic excavators 土方机械 步履式液压挖掘机 Standard Type GBT ICS 53.100 CCS P97 Status 现行 Issue Date 2019-08-30 Implementation 2020-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A