Fit of the respirator to the face is very important. If it does not fit properly, airborne contaminates will penetrate (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。
In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full fa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。