document.write('<br><span style="font-size:15px">上一篇</span> <a href=/shtmlnewsfiles/ecomnews/665/2012/201291617121247823.shtml  target="_blank">常见制冷剂及应用范围</a><br><span style="font-size:15px">下一篇</span> <a href=/shtmlnewsfiles/ecomnews/665/2012/201291617133304541.shtml  target="_blank">制冷机的分类及性能</a>')