said grinding wheel means being mounted for rotation about {HEAD ~ an axis} which is inclined at {TAIL ~ an acute angle} to and which diverges from the direction of movement of the stock 
is inclined at
said grinding wheel means being mounted for rotation about { HEAD ~ an axis } which is inclined at { TAIL ~ an acute angle } to and which diverges from the direction of movement of the stock
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH