From the bottom side you can see tow pairs of holes for the valves and the spark plug holes nestled between them.

从下至上的球队中，你可以看到拖车对黑洞的阀门和火花塞孔坐落关系。

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From the bottom side you can see tow pairs of holes for the valves and the spark plug holes nestled between them.

从下至上的球队中，你可以看到拖车对黑洞的阀门和火花塞孔坐落关系。

youdao