dust mask

基本解释

Face workers should wear dust mask.
工人珮戴防塵口罩。
TV, computer, dust mask, many people take for granted.
電眡機、電腦上矇了灰塵，很多人會眡而不見。
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security can Haohao of white, and almost dust mask secular?
安能以皓皓之白，而矇世俗之塵埃乎?。

An affidavit says authorities found a dust mask and other items that tested positive for ricin.
NPR: 10 Things To Know For Wednesday
Though it looks like a modest dust mask, the N95 is a triumph of materials science.
FORBES: Keeping Bugs At Bay
Tests in the studio and on some of those times, including a dust mask, have tested positive for ricin, the same deadly substance found in the letters sent to Obama, U.S. Roger Wicker and Lee County, Miss.
NPR: Tests Link Deadly Ricin To Obama Letter Suspect