In operation, a user moves the belt sander along the guide rails while the abrasive surface contacts {HEAD ~ the exterior surface} of the work piece to smooth {TAIL ~ the exterior surface} of the work piece 
to smooth
In operation , a user moves the belt sander along the guide rails while the abrasive surface contacts { HEAD ~ the exterior surface } of the work piece to smooth { TAIL ~ the exterior surface } of the work piece
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH