The transducer elements are impressed with {HEAD ~ voltage} through {TAIL ~ the printed circuit} and ground electrode to issue ultrasonic waves 
through
The transducer elements are impressed with { HEAD ~ voltage } through { TAIL ~ the printed circuit } and ground electrode to issue ultrasonic waves
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH