[{"title":"( 4 个子文件 619KB ) 二级圆柱减速齿轮课程设计(三张图纸,一份说明书)","children":[{"title":"二级圆柱减速齿轮(三张图纸,一份说明书)","children":[{"title":"装配图.dwg <span style='color:#111;'> 205.38KB </span>","children":null,"spread":false},{"title":"轴.dwg <span style='color:#111;'> 109.78KB </span>","children":null,"spread":false},{"title":"齿轮.dwg <span style='color:#111;'> 56.91KB </span>","children":null,"spread":false},{"title":"说明书.doc <span style='color:#111;'> 1.68MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]