document.write("<span class='prev'>");document.write("<a href='show/?");document.write("12.html");document.write("'>Prev: ");document.write("fine&nbsp;grinding");document.write("</a>");document.write("</span><span class='next'>");document.write("<a href='show/?");document.write("10.html");document.write("'>Next: ");document.write("heat&nbsp;treatment");document.write("</a>");document.write("</span>");