[Problems in improving and standardizing anti-dust respirators].
D004391:Dust / Q000517:prevention & control*; D008906:Mining / Q000295:instrumentation*; D011482:Protective Devices / Q000592:standards*; D012134:Respiratory Protective Devices / Q000592:standards*
D004391:Dust
Voprosy sovershenstvovaniia i unifikatsii protivopylevykh respiratorov.