齿轮轮齿接触印痕
gear tooth contact pattern
复合轮齿齿轮副
complex wheel teeth gear set
小齿轮轮齿啮合
pinion gear tooth contact
小齿轮轮齿啮合型式
pinion tooth contact pattern
差速器齿轮齿隙调整
differential gear backlash adjustment
差速器小齿轮齿损坏
differential pinion tooth failure
超大模数齿轮齿条
Super-modulus Gear and Rack