用“particulate filter”造句大全,particulate filter造句
Inagasmaskdesignedtoguardagainstabiologicalthreat,averyfineparticulatefilterisuseful.Ifyouhaveeverheldaclothorhandkerchiefoveryourmouthtokeepdustoutofyourlungs,youhavecreatedanimprovisedparticulatefil...