medical masks
英
美
- 医用口罩
双语例句
- Many medical facemasks, not approved as respirators, do not seal tightly to the face allowing airborne hazards to enter the breathing zone.
许多没有被批准作为呼吸防护口罩的医用口罩，不能与面部密合，空气污染物会直接进入呼吸道。
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