所述排气阀包括一排气螺钉、 一弹簧、一钢球，阀球在弹簧作用力下抵靠通道上。
The vent valve comprises an air vent screw, a spring and a valve ball which leans against the channel under the acting force of the spring.
气体推助器包括波纹管及内部弹簧、排气阀、吸气阀，气体节流调节系统包括限压阀、限速阀、隔板。
The gas throttling governing system comprises a pressure-limiting valve, a speed-limiting valve and a partition board.
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