[{"title":"( 2 个子文件 282KB ) 降压/升压DC—DC转换器四开关控制方法.rar","children":[{"title":"0334、降压/升压DC—DC转换器四开关控制方法","children":[{"title":"使用者请先阅读说明.txt <span style='color:#111;'> 29.69KB </span>","children":null,"spread":false},{"title":"降压/升压DC—DC转换器四开关控制方法.pdf <span style='color:#111;'> 277.20KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]