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facepiece
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【医】 面具, 面壳
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详细解释：
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以下为句子列表：
英文: 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.
中文: 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。
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英文: 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.
中文: 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。
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