pdf2txtの行の長さの分布
エンジニアの知的生産術：横書き、デジタルPDF
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max=168知の探検学：縦書き、OCR_PDF
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max=169"Engineer's way of creating knowledge" the English version of my book is now available on [Engineer's way of creating knowledge]
(C)NISHIO Hirokazu / Converted from [Scrapbox] at [Edit]