document.write("<a href='show/?");document.write("175.html");document.write("'>上一篇：");document.write("500立方沼气双膜气柜");document.write("</a>");document.write("<br />");document.write("<a href='show/?");document.write("166.html");document.write("'>下一篇：");document.write("500立方独立双膜气柜");document.write("</a>");