3K行星齿轮系
K type planetary gear trains
损坏的正时齿轮系
damaged timing gear train
回归周转齿轮系
reverted epicyclic gear train
reverted epicyclic g+A89ear train
行星齿轮系电动机
planetary-gear-train motor
行星伞齿轮系
planetary bevel gear train
锥齿轮差动轮系
bevel geared differential gear train