[{"title":"( 3 个子文件 797KB ) 机械设计或文档或dwg文件CAD-汽车起重机伸缩臂系统设计.zip","children":[{"title":"毕业设计 汽车起重机伸缩臂系统设计","children":[{"title":"汽车起重机伸缩臂系统设计.doc <span style='color:#111;'> 1.74MB </span>","children":null,"spread":false},{"title":"臂架装配图.dwg <span style='color:#111;'> 111.20KB </span>","children":null,"spread":false},{"title":"开题报告.doc <span style='color:#111;'> 50.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]