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Shape and structure of control sluices
中国大运河技术史

Shape and structure of control sluices图片(共4张) :
Shape and structure of control sluices

        The book,The History of the Yuan Dynasty:a Chronicle of Canals,describesthe Huitong Sluice as follows:The sluice is 31.68 m long,24.34 m wide,has two parallel walls on the main body of the sluice (each is 12.67 mlong),two wing walls (each has a length of     (共 1890 字)     [阅读本文] >>

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