We have main engine start.

我们在启动主发动机。

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The second main part is start motor which is used to start the engine.

第二个主要的部件是起动机，它用于起动发动机。

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We have to warm the main engine before we start it.

在起动主机前，我们必须暖缸。

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We have to warm the main engine before we start it.

在起动主机前，我们必须暖缸。

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