[{"title":"( 2 个子文件 3.89MB ) 电磁直立车资料(文档+视频)","children":[{"title":"电磁组直立行车参考设计方案2.0.pdf <span style='color:#111;'> 4.05MB </span>","children":null,"spread":false},{"title":"视频下载地址.txt <span style='color:#111;'> 70B </span>","children":null,"spread":false}],"spread":true}]