当齿沟啮合面旋转至壳体排气口时，较高压力的油气混合气体排出机体。
When the mesh surface rotation teeth to shell vent, under high pressure gas mixture in the oil and gas discharge.
目测检查排气口以确保当压力为零时，排气处于全开位置。
Visually inspect vent to ensure that vent goes to full open position when the pressure is at zero.
排气口密封设计得可以安全地承受全部钢瓶压力。
The outlet seals are designed to safely contain full cylinder pressure.
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