[{"title":"( 3 个子文件 4.14MB ) AD18教程第二课(Altium Designer PCB设计布局布线入门)","children":[{"title":"EDA设计教程2","children":[{"title":"AD第二课.pdf <span style='color:#111;'> 2.60MB </span>","children":null,"spread":false},{"title":"说明.txt <span style='color:#111;'> 117B </span>","children":null,"spread":false},{"title":"PCB1.PcbDoc <span style='color:#111;'> 2.07MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]