document.write ("<b>上一篇</b>：<a href='/DocHtml/1/2007/12/5/50367562194.html'>受控定向钻探技术（一）</a><br><b>下一篇</b>：<a href='/DocHtml/1/2007/12/5/49093148192.html'>特种钻探享誉四方（一）</a>")