Home / Standards / GB/T 21934-2008 GB/T 21934-2008 Active Earth-moving machinery - Plough bolt 土方机械 沉头方颈螺栓 Standard Type GBT ICS 53.100 CCS P97 Status 现行 Issue Date 2008-06-03 Implementation 2009-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会