Each transducer can be in {TAIL ~ communication} with a header for supporting {HEAD ~ the transducer} 
Each transducer can be in { TAIL ~ communication } with a header for supporting { HEAD ~ the transducer }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD