Concave key surfaces add to the typing comfort.

下凹的按键表面增加了打字的舒适度。

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Its key surfaces need the precision processing of micron level, and form the thin neck that is only tens of microns thickness.

挠性接头的关键部位要经过微米级精密加工，形成厚度仅几十微米的细颈。

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Its key surfaces need the precision processing of micron level, and form the thin neck that is only tens of microns thickness.

挠性接头的关键部位要经过微米级精密加工，形成厚度仅几十微米的细颈。

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