[{"title":"( 2 个子文件 99KB ) USB2.0 HUB原理图+PCB文件","children":[{"title":"原理图和PCB源文件","children":[{"title":"USB2.0 HUB.Sch <span style='color:#111;'> 33.90KB </span>","children":null,"spread":false},{"title":"USB2.0 HUB.PCB <span style='color:#111;'> 523.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]