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Project management:Mainly water sources and dams
中國大運(yùn)河技術(shù)史

        In the Ming and Qing Dynasties,the Grand Canal was divided intoseveral sections according to the geographical features along thecanal.In the Ming Dynasty,the canal was divided into seven sections,that is,Bai Cao ( "Cao" means canal),Wei Cao,Zha Cao,He Cao    （共 7782 字）     [閱讀本文] >>

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