小齿轮轮齿啮合
pinion gear tooth contact
小齿轮轮齿啮合型式
pinion tooth contact pattern
变速器倒档齿轮
transmission reverse gear
齿轮齿倒角机
gear tooth chamfering machine
tooth chamfering machine
传动箱倒档齿轮
transmission reverse gear
倒档齿轮传动系统
gear shifting transmission system
差速器小齿轮齿损坏
differential pinion tooth failure
齿圈与小齿轮齿数比
ring and pinion gear ratio