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並前往https://books.google.com.tw/books?id=CMY6AQAAMAAJ&pg=RA2-PA143-IA2&lpg=RA2-PA143-IA2&dq=letters%E4%B8%AD%E6%96%87&source=bl&ots=I5Z_o4XbOG&sig=ACfU3U3u0KOAuip-ja41VnDKrkCZJGzLFw&hl=zh-TW&sa=X&ved=2ahUKEwj58YKv9aH0AhXzk2oFHVl7CDYQ6AF6BAg_EAM

Patents for Inventions. Abridgments of Specifications

The object of the invention is to allow several letters to be printed ... 中文 d e a de 2550. ... Each letter is represented by a key , Figs .

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