用“respirator”造句大全，respirator造句
Twoothertypesofrespiratorsystemssolvetheleakproblem.HowdoIremoveanddisposeofmyrespirator?Whenwearingarespiratorforlongperiodsoftime,itmaybenecessarytotakemorefrequentshortbreaksorinterspersetasksnotre...
用“oxygen respirator”造句大全，oxygen respirator造句
Theoxygenrespiratoriswithsimplestructure,highreliability,largeoxygenstorageandlongtimeforkeepingpressure.Thesturctureandtheprincipleoftheoxygenrespiratorwithpositivepressureareanalysed.Baseonit,thepap...