盲文点字模型(Braille Patterns)2900-297F： 追加箭头-B(Supplemental Arrows-B)2980-29FF：
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... braille paper 盲文印刷纸 braille patterns 盲用点字 braille print 布莱叶盲字 ...
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His senior year in High School, Greeley invented a device that translated the light patterns on a computer screen into Braille, so the visually impaired could use a computer.
FORBES: Stretching The 'Rubber Duck' Concept
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