vacuum valve meaning in Chinese

〔主英〕【无线电】电子管，真空管。

The vacuum valve opens to admit air .
真空阀开启以补充空气。
Ships and marine technology . pressure vacuum valves for cargo tanks
船舶技术.货槽用压力真空阀
Ccevv coolant control engine vacuum valve
冷却水温控制引擎真空阀
Ships and marine technology - pressure vacuum valves for cargo tanks
船舶与海上技术货油舱压力真空阀
Ships and marine technology - pressure vacuum valves for cargo tanks
船舶与海上技术.散货船真空压力阀

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