needle valve

基本解释

Open vent needle valve fully until dripping from vent connection stops.
完全开启排气针形阀直到从排气连接处的滴漏停止为止。
Open needle valve "B" and vent or bypass needle valve, bleeding to atmosphere, then closing needle valve "B" restores the system to a normal static condition.
开启针形阀“B”和排气或旁路针形阀，排放到大气中，然后关闭针形阀“B”，将系统恢复到正常的静止状态。
Open vent needle valve and bleed air from hose. Then close vent valve.
开启排气针形阀，并从软管排放空气。然后关闭排气阀。

a valve containing a tapered rod that can be moved in or out to control the flow of a fluid

针阀
Add needle valve and T-junction to the tubing of vacuum water pump.
在真空水泵的管路中增加针阀和三通等部件。
机械工程
针阀
针行阀
针塞
针型阀
针形阀