differential pulley
device consisting of a movable pulley, two wheels with different diameters fixed together serving as the fixed pulley and a chain loop; device multiplying force; machine used to lift heavy loads
en-GB/ˌdɪfəˈɹɛnʃl pʊliː/
device consisting of a movable pulley, two wheels with different diameters fixed together serving as the fixed pulley and a chain loop; device multiplying force; machine used to lift heavy loads