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