Connect vent line at fuel damper (if equipped).

连接燃油脉冲器的排放管路(若配备)。

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Open the valve on the vent line just upstream the trip valve.

打开速闭阀上游放空管线上的阀门。

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The hydraulic calculation of vent line is an interesting but difficult problem in natural gas gathering engineering design.

放空管路水力计算是天然气集输工程设计中一个令人极感兴趣、却又常常使人困惑的问题。

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