GB 38451-2019呼吸防护自给开路式压缩空气逃生呼吸器标准
英文:Respiratory protection—Self-contained open-circuit compressed air breathing apparatus for escape GB 38451-2019介绍: 国家标...
英文:Respiratory protection—Self-contained open-circuit compressed air breathing apparatus for escape GB 38451-2019介绍: 国家标...