I don’t know if you know about SCBA? Although in daily life, air breathing machine is not often mentioned. But in fire control, chemical industry, shipping, petroleum, smelting, electric power, warehouse, laboratory, mining and other key fire departments are irreplaceable. SCBA for firefighters or emergency medical personnel in the smoke, gas, steam and hypoxia and other environments in a safe and effective fire fighting, rescue and disaster relief and rescue work, is an ideal personal respiratory protection device for firefighters or emergency medical personnel.