Two circuit board design can not be connected with the printed circuit,often in front with a connected across the line,which is often seen in ordinary plate,in order to let the automatic machine and automatic plug-in machine normal work,with zero resistance instead of cross the line.电路板设计中两点不能用印刷电路连接,常在正面用跨线连接,这在普通板中经常看到,为了让自动贴片机和自动插件机正常工作,用零电阻代替跨线.