{HEAD ~ Electrode layers} are formed on {TAIL ~ planes} of a plate shaped piezoelectric element to provide an ultrasonic transducer material 
are formed on
{ HEAD ~ Electrode layers } are formed on { TAIL ~ planes } of a plate shaped piezoelectric element to provide an ultrasonic transducer material
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH