درک مجموعه دنده های سیاره ای!

درک مجموعه دنده های سیاره ای!
The planetary gear set, also known as the epicyclic gear train, is one of the most important and interesting inventions in engineering. They are great speed variation mechanisms, and are often used in automobiles as a vital part of automatic transmissions. We will explore the secrets of the planetary gear set in this video.