卫生部重点准备那些带过滤装置的口罩，这种口罩的过滤器可以防止人吸入空气中的一些微粒。
The Department of Health has focused on getting what are known as respirator masks. These have filters, which stop a person breathing in some particles in the air.
如果你曾经用布或手绢捂住嘴来阻挡灰尘吸入，那么你就自创了简易微粒过滤器。
If you have ever held a cloth or handkerchief over your mouth to keep dust out of your lungs, you have created an improvised particulate filter.
所有与泵相连的管线彻底冲洗后，连续两次检查没有发现垃圾碎块后，拆掉临时的吸入粗滤器。（请指正）
After all lines available to the pump have been thoroughly flushed, remove the temporary suction strainer after finding no debris on two successive examinations.
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