Home / Standards / GB/T 39757-2021 GB/T 39757-2021 Active Building construction machinery and equipment—Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom 建筑施工机械与设备 混凝土泵和泵车安全使用规程 Standard Type GBT ICS 91.220 CCS P97 Status 现行 Issue Date 2021-03-09 Implementation 2022-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A