A cylinder gauge capable of comparing and measuring {HEAD ~ a diameter} of {TAIL ~ a hole} of a workpiece 
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A cylinder gauge capable of comparing and measuring { HEAD ~ a diameter } of { TAIL ~ a hole } of a workpiece
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH