The first flexible element produces a force moment about {HEAD ~ the axis} in {TAIL ~ a first direction} biasing the force modifying member into rotation in the first direction 
in
The first flexible element produces a force moment about { HEAD ~ the axis } in { TAIL ~ a first direction } biasing the force modifying member into rotation in the first direction
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH