单词	gas helmet
释义	gas helmet Thesaurus Noun 1. gas helmet - a protective mask with a filter; protects the face and lungs against poisonous gasesgasmask, respiratormask - a protective covering worn over the face gas helmet noun Synonyms for gas helmet noun a protective mask with a filter Synonyms gasmask respirator Related Words mask
随便看	tetramethyldiaminobenzophenone tetramethyldiarsine tetramethylene tetramethylenediamine tetramethylene oxide tetramethylethylenediamine tetramethyl lead tetramethyllead tetramethylorthosilicate tetramethyl reductic acid tetramethyl-rhodamine tetramethyl rhodamine ethyl ester tetramethyl rhodamine iso-thiocyanate tetra methyl silane tetramethyl silane tetramethylsilane tetramethylsilane and trimethylsilyl group tetramethylsilane or trimethylsilyl group tetramethylsuccinamide tetramethylthiuram monosulfide tetramethylurea tetrametric tetramino tetra mobile county code tetramorph

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