[{"title":"( 9 个子文件 13.33MB ) 机械设计和机械原理ppt","children":[{"title":"机械设计与原理3","children":[{"title":"第十八章 齿轮传动.ppt <span style='color:#111;'> 3.70MB </span>","children":null,"spread":false},{"title":"第十章 其它常用机构.ppt <span style='color:#111;'> 2.70MB </span>","children":null,"spread":false},{"title":"第十一章 机械系统动力学.ppt <span style='color:#111;'> 863.00KB </span>","children":null,"spread":false},{"title":"第十二章 机械的平衡.ppt <span style='color:#111;'> 1.46MB </span>","children":null,"spread":false},{"title":"第十七章 带传动和链传动.ppt <span style='color:#111;'> 2.52MB </span>","children":null,"spread":false},{"title":"第十三章 机械零件设计基础.ppt <span style='color:#111;'> 727.00KB </span>","children":null,"spread":false},{"title":"第十六章 螺旋传动.ppt <span style='color:#111;'> 742.00KB </span>","children":null,"spread":false},{"title":"第十四章 螺纹连接.ppt <span style='color:#111;'> 4.73MB </span>","children":null,"spread":false},{"title":"第十五章 轴毂连接.ppt <span style='color:#111;'> 870.50KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]