tangential hobbing

例句：

1. 1. The angle of the roof is tangential to the wall.
   屋顶与墙成切线角度。
2. 2.The line of best fit is often tangential to the curve.
   最佳拟合线通常与曲线相切。
3. 3.The tangential force is the force that acts between two surfaces at a point.
   切向力是两个表面在一点相互作用的力。