Home / Standards / GB/T 27998-2011 GB/T 27998-2011 Active Balance crane 平衡式起重机 Standard Type GBT ICS 53.020.20 CCS J80 Status 现行 Issue Date 2011-12-30 Implementation 2012-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A