Home / Standards / GB 13447-1992 GB 13447-1992 Abolished Steel blank for seamless gas cylinder 无缝气瓶用钢坯 Standard Type GB ICS 77.140.30 CCS H43 Status 废止 Issue Date 1992-04-24 Implementation 1992-12-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A