What is the shelf life of 3M's filtering facepiece respirators?
3M随弃式呼吸防护口放期是多长时间?
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,请要求压力下,穿保护衣和国立职业与健康研究所批准呼吸器械和口。
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