noun
or planet gear
: an epicyclic train that has two contiguous and parallel main wheels usually of equal diameter but of unequal number of teeth meshing with a single pinion
noun
or planet gear
: an epicyclic train that has two contiguous and parallel main wheels usually of equal diameter but of unequal number of teeth meshing with a single pinion
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012