Air Breathing Apparatus is a safety equipment which can protect human’s respiratory system when the users work in the smoke, poisonous gas or under hypoxia environment.It is widely used in firefighting, chemical industry, shipbuilding, petroleum, metallurgy, mining, laboratories etc. There are many different types of breathing apparatus according to user's specific need, such as self-contained breathing apparatus, escape respirators, pump long tube air breathing apparatus, self-inhalation long tube breathing apparatus, trolley movable long tube air breathing apparatus etc.