{HEAD ~ The second ends} of the elongated flexible elements are connected respectively to the first and second surfaces at one end of the surface, wherein the fexible elements are operable to be wound or unwound on the respective surfaces as the member rotates about {TAIL ~ the axis} 
{ HEAD ~ The second ends } of the elongated flexible elements are connected respectively to the first and second surfaces at one end of the surface , wherein the fexible elements are operable to be wound or unwound on the respective surfaces as the member rotates about { TAIL ~ the axis }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL