单词：planetary pinion
planetary pinion的用法和样例：
例句
- Planetary gear systems are also used in many automatic transmissions.行星齿轮组也同样用于许多汽车变速器中。
- The Nexus transmission uses planetary gearing similar to a car's automatic transmission.纳克索斯变速系统使用的行星齿轮，和汽车的自动排档类似。
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