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Shaft 1 rotates about fixed axis A and its motion is transmitted through meshing gears 2 and 3 to shaft 4 which rotates about fixed axis B. Rotation is transmitted further through meshing gears 5 and 6 to spindle 7 which rotates about fixed axis C, and through meshing gears 8 and 9, with a lower transmission ratio, to drum 10. Owing to the difference in angular velocities, drum 10 turns with respeā€¦