document.write("<span class='prev'>");document.write("<a href='show/?");document.write("29.html");document.write("'>Prev: ");document.write("Crush&nbsp;loading&nbsp;inspection&nbsp;machine");document.write("</a>");document.write("</span><span class='next'>");document.write("<a href='show/?");document.write("27.html");document.write("'>Next: ");document.write("microscope&nbsp;");document.write("</a>");document.write("</span>");