[{"title":"(3个子文件44.62MB)ALTIUM_DESIGNER实用宝典:原理图与PCB设计.pdf","children":[{"title":"使用说明.txt <span style='color:#111;'>2.61KB</span>","children":null,"spread":false},{"title":"AltiumDesigner实用宝典下载pdf文档_原理图与PCB设计-pc6下载站.url <span style='color:#111;'>73B</span>","children":null,"spread":false},{"title":"ALTIUM_DESIGNER实用宝典:原理图与PCB设计.pdf <span style='color:#111;'>46.26MB</span>","children":null,"spread":false}],"spread":true}]