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。
Captain: Here you are. We need 5 shackles, 3 valves, 10 nozzles and 5 bearings.
船长：给您。我们需要5个卸扣、3个阀门、10个喷嘴和5个轴承。
Pacific Valves will be glad to advise you on your application.
美国太平洋阀门公司为用户的应用提供建议。
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