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Edité par Zhejiang Education Pub. Date :2007-08-01 version 1, 2000
ISBN 10 : 7533871561ISBN 13 : 9787533871567
Vendeur : liu xing, Nanjing JiangSu, JS, Chine
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paperback. Etat : New. Language:Chinese.Pages Number: 65 Publisher: Zhejiang Education Pub. Date :2007-08-01 version 1. Contents: tools and machinery 1. The use of tools 22. Leverage science 43 Tools for Research lever 64. Secret axle 85. Be pulley and the pulley 106. pulley 127. slope of the role of 148. bike on the shape and structure of simple machines 16 1 resistance to bending 182. shape and flexural capacity of 20 3 22 4 arched force. arc looking for 245. do frame 266. to build the tower 287. bridge shape and.