File:The sketch (drawing) of roller chain, Leonardo da Vinci.jpg

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Description	English: The sketch of Roller chain, Leonardo da Vinci Website of Japan Chain association History of Chain at the Wayback Machine (archived 2014-01-07) 日本語: レオナルド・ダ・ヴィンチのローラーチェーンのスケッチ
Date	Up loaded　1 Dec., 2008
Source	http://www.jca333.jp/jp/index02.html Japan Chain Association (日本チェーン工業会） Japan Chain Association website mentioning in Japanese that this sketch is deemed first sketch in his notebook (ノートにあるスケッチが最初と言われています。). Left click to see original sketch site after you open this site. This is website of sketch (drawing) of roller chain, Leonardo da Vinci. at the Wayback Machine (archived 2009-01-04) Original, The sketch (drawing) of roller chain, Leonardo da Vinci at the Wayback Machine (archived 2011-07-22)
Author	Namazu-tron

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:46, 30 November 2008		460 × 299 (46 KB)	wikimediacommons>Namazu-tron	{{Information \|Description={{en\|1=The sketch (drawing) of roller chain, Leonardo da Vinci}} {{ja\|1=レオナルド・ダ・ヴィンチのローラーチェーンのスケッチ}} \|Source=http://www.jca333.jp/jp/index02.html Japan Chain Association (日�

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