你可以滑动圆柱体边上的滑钮设定初始值，然后转动手柄来计算结果。

You set your initial figures by sliding knobs along the side of the cylinder, then turn the crank to compute the results.

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当你想要使用机械操纵系统操纵主机时，必须转动手柄到应急位置。

When you want to manoeuvre the main engine by the mechanical manoeuvring system, it is necessary to turn the handle to the "emergency" position.

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当你想要通过气动操纵系统操纵主机时，必须转动手柄到正常位置。

When you want to manoeuvre the main engine by the pneumatic manoeuvring system, it is necessary to turn the handle to the "normal" position.

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