遊ゆう星せい歯は車ぐるま

noun

planetary gear; planetary wheel

Mechanical engineering term for a gear system consisting of a central sun gear, planet gears, and a ring gear.

• 遊ゆう星せい歯は車ぐるま機き構こうは自じ動どう車しゃのトランスミッションによく使つかわれる。

  Planetary gear mechanisms are often used in automobile transmissions.