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 valve a to vent air from the vent hose.
开启阀门A从排气软管处排出空气。
Water drainage hose, charging valve shall be kept open.
为排出槽内和排水管中的水，应使排水阀保持开状态。
Water drainage hose, charging valve shall be kept open.
为排出槽内和排水管中的水，应使排水阀保持开状态。
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