{HEAD ~ The present invention} generally is related to propulsion systems operable in a fluid medium, and, more specifically, to {TAIL ~ a control system} for a traveling wave propulsion system 
is related to
{ HEAD ~ The present invention } generally is related to propulsion systems operable in a fluid medium , and , more specifically , to { TAIL ~ a control system } for a traveling wave propulsion system
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH