{HEAD ~ The ultrasonic transducer} includes a cadmium sulfide crystal with {TAIL ~ two electrodes} attached to the crystal 
{ HEAD ~ The ultrasonic transducer } includes a cadmium sulfide crystal with { TAIL ~ two electrodes } attached to the crystal
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH