[{"title":"( 2 个子文件 2.34MB ) Designing Planar Magnetics.rar","children":[{"title":"Designing Planar Magnetics","children":[{"title":"writing.pdf <span style='color:#111;'> 1.21MB </span>","children":null,"spread":false},{"title":"ppt.pdf <span style='color:#111;'> 1.46MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]