Feed is manually provided by cranking the handle of the compound rest.

通过摇动复式刀架操纵柄手动提供进给。

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In the early days of cars, you actually had to crank the engine with a little handle. Now the cranking motor or starter is just powerful enough to start the engine turning.

以前的汽车需使摇柄才能使发动机启动，现在启动机或点火机已足以使发动机启动了。

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