Use of diving breathing apparatus

Bite it down and breathe freely. One side of the respirator has a knob to adjust the air volume, which can be adjusted appropriately according to oneself.

Outside the respirator is the "breathing head", which is actually a small funnel-shaped thing with rubber texture. After biting, the funnel opens in your mouth and it is difficult to fall off unless you pull it out yourself.

The cylinder on the diver's back is filled with compressed air, not oxygen-the diver is not a critically ill patient and does not need pure oxygen. Further: advanced divers will involve the use of high-concentration oxygen: only at high altitude or under long-term diving or other extreme conditions.

Otherwise, it's all compressed air, that is, the ordinary air we usually breathe, which is just filled into the bottle in the form of high pressure (using a professional machine, about two or three cubic meters).

When you breathe, you just breathe normally. Inhale: you consume the gas in the cylinder; Exhale: direct exhalation: protruding air comes out of the mouths on both sides of the breathing head.