Home / Standards / GB 6220-2009 GB 6220-2009 Abolished Respiratory protection - Long tube breathing apparatus 呼吸防护 长管呼吸器 Standard Type GB ICS 13.340.30 CCS C73 Status 废止 Issue Date 2009-04-13 Implementation 2009-12-01 Responsible Dept 应急管理部 Drafting Unit N/A