她也说佩戴尺寸合适的口罩很重要——一些比较贵的过滤式口罩是按照人的脸型制作的，不像在大街上就能买到的那些标准口罩。
She also said it was important they were correctly fitted - some of the more expensive respirator masks are molded to fit the face unlike standard masks that can be bought on the high street.
过滤式防微粒口罩总透漏率的试验方法。
Test method for total inward leakage of filtering particle respirator.
过滤式防微粒口罩对空气流呼吸阻力的试验方法。
Test method for airflow resistance of respiration of filtering particle respirator.
过滤式防微粒口罩死腔的试验方法。
Test method for the dead space of filtering particle respirator.
随弃式呼吸防护口罩是呼吸器的一种，呼吸防护口罩的面罩整体都是由过滤材料构成的。
Disposable or filtering facepiece respirators are a type of respiratory protection in which the entire respirator facepiece is comprised of filter material.
随弃式呼吸防护口罩是呼吸器的一种，呼吸防护口罩的面罩整体都是由过滤材料构成的。
Disposable or filtering facepiece respirators are a type of respiratory protection in which the entire respirator facepiece is comprised of filter material.
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