China 'GB/T 39757-2021
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 39757-2021
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
Issued Date:2021/3/9
Implemented Date:2022/2/1
Issued by:
The Standardization Administration of the People's Republic of China
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