{HEAD ~ A self centering construction} 19 wherein {TAIL ~ said axial movement} means comprises a second liquid spring operable in tension and compression on each of said liquid springs 
wherein
{ HEAD ~ A self centering construction } 19 wherein { TAIL ~ said axial movement } means comprises a second liquid spring operable in tension and compression on each of said liquid springs
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH