The probe shaft is aligned so that the rough specimen on the probe tip is inside {HEAD ~ the perimeter} of {TAIL ~ the specimen assembly form} , preferably in or near the geometrical center of the open area of the specimen assembly form 
of
The probe shaft is aligned so that the rough specimen on the probe tip is inside { HEAD ~ the perimeter } of { TAIL ~ the specimen assembly form } , preferably in or near the geometrical center of the open area of the specimen assembly form
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH