needle valve [机] 针阀 ; 针形阀 ; 针型阀 ; 针孔阀
needle valve seat [机] 针阀座 ; 针状活门座
angle needle valve 弯角针形阀
bar-stock needle valve 杆控针形阀
oil-fuel injector needle-valve 喷油器针阀
oil pot with needle valve 针阀油杯
nozzle needle valve 喷油嘴针阀
steam needle valve 进口蒸汽针型阀 ; 针型阀
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。
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 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。
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