Home / Standards / GB/T 11638-2020 GB/T 11638-2020 Active Acetylene cylinders 乙炔气瓶 Standard Type GBT ICS 23.020.30 CCS J74 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 国家标准委 Drafting Unit N/A