document.write('<br><span style="font-size:15px">上一篇</span> <a href=/shtmlnewsfiles/ecomnews/613/2012/2012100518394724743.shtml  target="_blank">制冷量和制热量</a><br><span style="font-size:15px">下一篇</span> <a href=/shtmlnewsfiles/ecomnews/613/2012/2012120109252380867.shtml  target="_blank">制冷基本原理</a>')