File:水磨齿轮.jpg

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Summary

Description
English: water mill gear
Date
Source mybook
Author Wang Chen, fl. 1290 – 1333)

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inception

25 April 2011

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Date/TimeThumbnailDimensionsUserComment
current10:20, 25 April 2011Thumbnail for version as of 10:20, 25 April 2011737 × 1,000 (137 KB)commons>Gisling

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