GB/T 38228-2019呼吸防护自给闭路式氧气逃生呼吸器国家标准
英文:Respiratory protection—Self-contained closed-circuit oxygen breathing apparatus for escape GB/T 38228-2019介绍: 国家标准《呼吸...
英文:Respiratory protection—Self-contained closed-circuit oxygen breathing apparatus for escape GB/T 38228-2019介绍: 国家标准《呼吸...