FIG 1 schematically shows a view of an example of {HEAD ~ the invention} of {TAIL ~ a measurement} 
of
FIG 1 schematically shows a view of an example of { HEAD ~ the invention } of { TAIL ~ a measurement }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL