Home / Standards / GB/T 11638-2011 GB/T 11638-2011 Abolished Dissolved acetylene cylinders 溶解乙炔气瓶 Standard Type GBT ICS 23.020.30 CCS J74 Status 废止 Issue Date 2011-07-20 Implementation 2012-06-01 Responsible Dept 国家标准委 Drafting Unit N/A