facepiece meaning in English

密闭头盔面罩
面具面壳
面罩罩

Performance test methods for facepiece of filfer type respirator
过滤式防毒面具面罩性能试验方法
Fit of the respirator to the face is very important . if it does not fit properly , airborne contaminates will penetrate ( enter underneath ) the facepiece seal
佩戴合适脸型的防毒口罩非常重要。否则空气中的有害细菌仍能够从口罩和脸部的缝隙中渗透进来。
Respiratory protective devices - plug - in connection between lung governed demand valve and facepiece for self - contained open - circuit compressed air breathing apparatus for use by german fire brigade
呼吸保护器.德国消防队用自调需氧量氧气调节阀与独立
In the event of a fire , wear full protective clothing and niosh - approved self - contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode
如果发生火灾，请在要求的压力下，穿保护衣和国立职业安全与健康研究所批准的呼吸器械和口罩。