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Are you Hong-Sen Yan, author of the books below?
Reconstruction Designs of Lost Ancient Chinese Machinery by Hong-Sen Yan Creative Design of Mechanical Devices by Hong-Sen Yan International Symposium on History of Machines and Mechanisms by Hong-Sen Yan Reconstruction Designs of Lost Ancient Chinese Machinery. His... by Hong-Sen Yan History of Mechanical Technology and Mechanical Design 2012 by Hong-Sen Yan The Beauty of Ancient Chinese Locks by Hong-Sen Yan [(International Symposium on History of Machines and Mechanis... by Hong-Sen Yan Reconstruction Designs of Lost Ancient Chinese Machinery by Hong-Sen Yan International Symposium on History of Machines and Mechanisms by Hong-Sen Yan International Symposium on History of Machines and Mechanisms by Hong-Sen Yan


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