Home / Standards / GB/T 21682-2008 GB/T 21682-2008 Active Rotary drilling rig 旋挖钻机 Standard Type GBT ICS 91.220 CCS P97 Status 现行 Issue Date 2008-04-22 Implementation 2008-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A