Planetary gear systems are also used in many automatic transmissions. 行星齒輪組也同樣用于許多汽車(chē)變速器中。
This means that in emergency situations or sudden deceleration, the transmission can quickly step down to LOW gear. 這意味著(zhù)在緊急情況或突然減速時(shí)變速器能夠快速的降到低齒輪。
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