Touch type key board to have excellent operational sensitivity.

为触摸式输入键盘,操控敏感度佳.

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Perforator: Key board which produces prunched paper tape.

打孔机: 把纸带打孔的键盘.

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And other correlative designs about key board , LCD screen, memory chip was also introduced.

对其外围的一些电路设计如与键盘 、 液晶 、 存储芯片做了介绍和说明.

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