Home / Standards / GB 6221-1986 GB 6221-1986 Abolished Performance test methods of long tube respirators 长管面具性能试验方法 Standard Type GB ICS 13.340.20 CCS C73 Status 废止 Issue Date 1986-04-09 Implementation 1986-12-01 Responsible Dept 应急管理部 Drafting Unit N/A