| 摘要 |
A keyboard has a middle region that has upward longitudinal slopes rising to upper planes on both sides of the middle region. An alphanumeric section disposed in the keyboard housing generally in the middle region. The keyboard includes a first wing section and the second wing section in which each can be disposed at height of the keyboard housing at the upper plane. In one aspect, the alphanumeric section may be disposed below the height of the first and second wing section, and the alphanumeric section is laterally disposed between the first medial section and the second media section.
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