means for imparting rotation to said pulley, said means comprising a rotating means, means connecting said fixedly positioned flange to said rotating means; and means for connecting said {HEAD ~ axially movable flange} to said {TAIL ~ rotation} means while permitting the axial movement thereof, said means comprising an externally splined member connected to said axially movable flange and a meshing internally splined coupling member connected to said rotation means 
to
means for imparting rotation to said pulley , said means comprising a rotating means , means connecting said fixedly positioned flange to said rotating means ; and means for connecting said { HEAD ~ axially movable flange } to said { TAIL ~ rotation } means while permitting the axial movement thereof , said means comprising an externally splined member connected to said axially movable flange and a meshing internally splined coupling member connected to said rotation means
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