[{"title":"(5个子文件566KB)超声波测距模块原理图PCB","children":[{"title":"超声波.pdf <span style='color:#111;'>138.41KB</span>","children":null,"spread":false},{"title":"超声波.SchDoc <span style='color:#111;'>95.50KB</span>","children":null,"spread":false},{"title":"超声波传感器说明.doc <span style='color:#111;'>500.50KB</span>","children":null,"spread":false},{"title":"超声波_BOM.xls <span style='color:#111;'>9.00KB</span>","children":null,"spread":false},{"title":"超声波.PCBDOC <span style='color:#111;'>181.50KB</span>","children":null,"spread":false}],"spread":true}]