document.write('<br><span style="font-size:15px">上一篇</span> <a href=/shtmlnewsfiles/ecomnews/613/2012/2012121500034875710.shtml  target="_blank">常见的制冷压缩机的分类,特点,工作原理</a><br><span style="font-size:15px">下一篇</span> <a href=/shtmlnewsfiles/ecomnews/613/2013/201380419303286345.shtml  target="_blank">氨制冷系统图和工作原理</a>')