RHZKF6.8/30 positive pressure air breathing apparatus RHZKF6.8/30 positive pressure air breathing apparatusPerformances A.Rear panelRear panel ... assemble and disassemble gas cylinder.C.Air supply valvePositive pressure, automatically activate for first breathing.Air demand ≥300 ... angles, with simple structure, easy to maintain.Positive pressure, avoid poisonous gas from entering mask.Design of double ...