differential gear assembly
gear ratio
齿轮传动比
齿轮速比
齿轮比例
齿轮齿数比
齿轮比
传动比
齿数比
速比
产生生成
overall reduction gear ratio
right-angle gear assembly
transmission gear ratio
axial compression ratio and slenderness ratio
2-grade deceleration straight-tooth gear box
2K-H differential gear trains
2K-H type epicyclic gear trains
2-Stage Star Gear Train
Ⅱ compound gear rotator pump