准椭球面齿轮传动
quasi-ellipsoid gear transmission
齿轮齿面接触强度
contact strength between gear and tooth face
硬齿面齿轮
hard tooth surface gears
hard tooth surface gear
hardened face gear
surface hardened gear
JRTR gear
hardened gear
Case-hardened Gear
gear with hardened surface
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