tangent surface meaning in English

切曲面
切线曲面

The latter is a tangent surface with c - b zier curve as spine curve
Zier曲线上单参数平面族与控制平面的关系。
The methods of development for cones and tangent surface on c - b zier curve and the complex surfaces are obtained
四、给出了c - b ? zier曲线上锥面、切线曲面以及复杂曲面的展开方法。
First , a map between the cones and tangent surface on c - b zier curve und two - dimensional plane is found respectively and then a ruled surface between two bezier curves is constructed and a sufficient condition on its developablity is given
Zier曲线上的锥面和切线曲面，分别建立了它们到平面的等距映射，给出了c - b ? zier曲线上锥面、切线曲面的展开方法。然后，构造两条空间b