The inside and outside move of use pressed key presses down the level change which or not brings to control corresponding the monolithic integrated circuit input or the outlet work.

内外招使用按键按下与否带来的电平的改变来控制对应的单片机输入或输出口工作。

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They are no longer prepared to sign up to 20- or 30-year franchises as long as a key element of risk, the state of the track, remains outside their control.

ECONOMIST: A better way to run a railway