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Chang Ssu-Hsün
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Chang Ssu-Hsün
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1 Encyclopedia Article
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Chang Ssu-Hsün
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Chang Ssu-Hsün
67 words, approx. 1 pages
Chang Ssu-Hsün fl. 900s Chinese inventor who is best known for his invention (in 976) of the chain drive for mechanical clocks. The first chain drive, designed by Philon of Byzantium in about 250...
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