... Powered air purifying respiratorPRF-102RM2 is a dust and gas proof powered air purifying respirator integrating breath, face and ... wearing, airtight, high filtrating efficiency, huge air flow, easy in operation with remarkable positive pressure, service life, airtight and ... of poisonous and harmful ill odors ( acidic gas, alkaline gas, neutral gas, organic gas coexist).But not unsuitable to anoxic (i.e ...