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drive shaft between two bearings which are bent to form at least one elbow with crank and crank pins for each and.each of the two bearings formed of concentric rings, between which is positioned an annular series of balls
drive shaft between two bearings which are bent to form at least one elbow with crank and crank pins for each and.each of the two bearings formed of concentric rings, between which is positioned an annular series of balls
