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Appendix A Working Principle
A.1 Pneumatic System
A.1.1 Pneumatic Diagram
1a/1b Filter 16 Blowing valve
2a/2b Check valve 17 Expiratory pressure sensor (P)
3 Water trap 18 Flow sensor
4a/4b Pipeline pressure sensor 19 Expiratory valve
5a/5b Pressure regulator 20 Expiratory outlet
6a/6b
Proportional
electromagnetic valve
21 Gas resistor
7a/7b Check valve 22 Pressure regulator
8a/8b Flow sensor 23 Flow control valve
9 MIXER 24 Gas reservoir
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