前端阀 FV-S ; FV-L ; FDV-L ; FDV
阀前后压力差 p
分电盘真空提前控制阀 distributor vacuum advance control valve
分电盘真空提前电磁阀 distributor vacuum advance solenoid
分电盘点火提前电磁阀 distributor advance solenoid
前动臂阀 foreboom valve
滑阀超前 [机] slide valve lead ; valve lead
前中继阀 front relay valve
配电盘真空提前阀 distributor vacuum advance valve
实验结果表明，缓冲罐的使用对减压阀前、后压力均能起到很好的稳定作用。
The results of experiments indicated that the usage of buffer tank had good steady effects on the pressure in both sides of the reducing valve.
阀前始终有凝结水，形成水封，无蒸汽泄漏。
There is always frozen water in front of the trap forming water block to avoid steam leaking.
应该如图所示在防回流阀前安装一个过滤器，防止阀瓣出现不必要的污垢。
A strainer should be installed as shown, ahead of backflow preventers to prevent discs from unnecessary fouling.
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