... apparatus is consisted of the movable air supply device and the breathing device . It is equipped with two ... fighting, chemical industry, shipping, laboratory, mine, pertroleum, facorty and metallurgy. a. the atmosphere that is polluted by smoke, poisonous ... . In the atmospheric environment of -30~+60C temperature, 0~100% relative humidity and 0.7bar~1.25bar atmosphere pressure.4.PackagePackaging: ...