bleed valve close signal tube 放气活门关闭信号管 ; 放气阀门关闭信号管
When oil begins to flow from end of hose, close bleed valve, remove hose, then tighten bleed valve.
当石油开始流从年底，胶管，关闭排气阀，删除胶管，然后收紧流血阀。
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" to bleed air and then close "b" and vent needle valve.
开启针形阀“B”排放空气，然后关闭“B”和排气针形阀。
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