A double walled configuration of the sleeve can be provided in {HEAD ~ the sections} incorporating {TAIL ~ the transmitter} and the receiver 
A double walled configuration of the sleeve can be provided in { HEAD ~ the sections } incorporating { TAIL ~ the transmitter } and the receiver
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH