document.write("·<a href='article/");document.write("201707");document.write("/");document.write("858");document.write(".html'>上一条：");document.write("一般PCB线路板外观是什么样");document.write("</a>");document.write("<br />·<a href='article/");document.write("201707");document.write("/");document.write("856");document.write(".html'>下一条：");document.write("详解PCB线路板的分类");document.write("</a>");