File:Decimal system by Fudetaro Suzuki in1927.jpg

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日本語: 鈴木筆太郎が考案した「十進系統図」。1927年。
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Author 山本海行

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current11:30, 30 April 2020Thumbnail for version as of 11:30, 30 April 2020418 × 1,522 (142 KB)山本海行 (talk | contribs)Uploaded own work with UploadWizard

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