[{"title":"( 5 个子文件 11.68MB ) 机械原理课件(清华大学申永胜主编)(上)","children":[{"title":"机械原理课件(上)","children":[{"title":"第2章 平面机构的运动分析.ppt <span style='color:#111;'> 698.50KB </span>","children":null,"spread":false},{"title":"第5章 齿轮机构.ppt <span style='color:#111;'> 8.86MB </span>","children":null,"spread":false},{"title":"第1章 平面机构组成原理及其自由度分析.ppt <span style='color:#111;'> 860.50KB </span>","children":null,"spread":false},{"title":"第4章 凸轮机构.ppt <span style='color:#111;'> 3.36MB </span>","children":null,"spread":false},{"title":"第3章 平面连杆机构.ppt <span style='color:#111;'> 2.83MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]