... time Movable long-tube positive pressure air breathing apparatusPurposes of productMovable long-tube positive pressure air breathing apparatus is a kind of safe ... and gas pipeline etc.Product structureThe device generally consists of stainless steel body, 4 air cylinders, 2 high pressure connecting ducts ... quarter body, 1 medium pressure meter, 1 reel and 50 meters of reel, 1 Y-shape joint and 2 rapid ...