一键开关操作；

One key switch operation;

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带堵转保护的手车和接地开关一键式电动操作。

Belt plugging turn protection handcart and grounding switch electrically operated with one button.

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例如，如果你要设计一个图标，告诉用户它切换或关闭，形成你会选择：在一个汽车点火锁在墙上，或一键灯开关吗？

For example, if you were to design an icon which tells the user it switches something on or off, which form would you chose: a light switch on the wall, or a key in an ignition lock of a car?

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