The array of transducer elements is attached to {HEAD ~ the circuits} so that {TAIL ~ the circuits} are oriented in planes parallel with the first plane 
The array of transducer elements is attached to { HEAD ~ the circuits } so that { TAIL ~ the circuits } are oriented in planes parallel with the first plane
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH