The vacuum valve opens to admit air.
真空阀开启以补充空气。
The vacuum valve opens to admit air .
真空阀开启以补充空气。
Connect vacuum hose to booster check valve.
连接真空软管到增压器检测阀。
Relief Angle valve. Pressure or vacuum can be specified.
安全角阀。可指定压力或真空度。
Relief Angle valve. Pressure or vacuum can be specified.
安全角阀。可指定压力或真空度。
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