These types of gearboxes encompass major central gear called as Solar, lesser gears rotating all-around it known as as planets & this whole arrangement rotates inside of a cylinder/ring called as ring equipment OR annular gear. Ability could be given to any with the gear & various number of speed https://automobile-gearbox52738.rimmablog.com/33277872/automobile-gearbox-things-to-know-before-you-buy