{TAIL ~ Apparatus} for checking diametral dimensions of {HEAD ~ a cylindrical part} in orbital motion in a numerical control grinding machine 
{ TAIL ~ Apparatus } for checking diametral dimensions of { HEAD ~ a cylindrical part } in orbital motion in a numerical control grinding machine
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH