In between, an electromagnetic vacuum inflation valve is installed in series, which opens and closes with the switch of the pre-stage pump.

在前级泵与主泵中间串联一个电磁真空充气阀，随前级泵开关而启闭。

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The NFL closes out its pre-season on the NFL Network where the Eagles will face the Jets and we'll get our last look at Vick before he finishes his three game regular season suspension.

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