Such gearboxes consist of big central gear named as Sunlight, smaller sized gears rotating all over it named as planets & this entire arrangement rotates inside of a cylinder/ring referred to as as ring equipment OR annular gear. Energy may be specified to any on the equipment & distinctive volume https://automobile-gearbox74949.blogrenanda.com/40460085/automobile-gearbox-things-to-know-before-you-buy