[{"title":"( 3 个子文件 2.68MB ) 基于51单片机超声波测距毕业设计","children":[{"title":"毕业设计:超声波测距,LCD液晶显示器配合美妙的音乐进行显示.doc <span style='color:#111;'> 318.50KB </span>","children":null,"spread":false},{"title":"基于AT89S52单片机的超声测距系统设计.doc <span style='color:#111;'> 113.50KB </span>","children":null,"spread":false},{"title":"51单片机超声波测距设计--毕业论文.doc <span style='color:#111;'> 2.86MB </span>","children":null,"spread":false}],"spread":true}]