Home / Standards / GB/T 20863.3-2007 GB/T 20863.3-2007 Abolished Cranes - Classification - Part :3 Tower cranes 起重机械 分级 第3部分: 塔式起重机 Standard Type GBT ICS 53.020.20 CCS J80 Status 废止 Issue Date 2007-03-21 Implementation 2007-08-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A