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