... of Advantages:This Oxygen Breathing Apparatus has simple structure, long time continuous working, less spare parts, small volume, light weight, full function ... , safe and reliable, comfortable, easy to use, easy to disassembly and maintain. It is one of ... Parameters : ModelOxygen CylinderVolumeWorking PressureOxyge SupplyFlow Volume of calcium hydroxide to fillUsing Time Apparatusweight(kg) ...