口罩

What is the shelf life of 3M's filtering facepiece respirators?

3M随弃式呼吸防的存放期是多长时间？

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，请在要求的压力下，衣国立职业安全与健研究所批准的呼吸器械。