I have a class web site: http://www.stonebtb.com/diamond+grinding.shtml

In the browser status code of 301 jump to: http://www.stonebtb.com/diamond-grinding.shtml
Google grab shows a status code of 404

Is meant to put all of the XXXX + XXXX. SHTML jump to 301 XXXX - XXXX. SHTML
Google grab this kind of web site showed 404 status code in
Use the browser is a normal 301 jump

Masters, what is the path to let Google also normal 301 jump