The elastic tube 7 also expands outwardly due to the expansion of {HEAD ~ the pressure} transmitting {TAIL ~ medium} 8 
transmitting
The elastic tube 7 also expands outwardly due to the expansion of { HEAD ~ the pressure } transmitting { TAIL ~ medium } 8
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH