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