干式通气管

dry vent的用法和样例:

例句

  1. A pilot-operated vent valve for pressure relief uses tank pressure, not weights or a spring, to keep the vent valve seat closed.先导式通气阀泄压时利用储罐压力,而不是重力或弹簧外力,来保持通气阀阀座关闭。

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adjust actual inventory
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Thebesian vein
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tossin'
Totes Geb.
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