平面族 meaning in English

family of planes

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。
Equal scale plane bind that contain a same point in space affine transformation
空间仿射变换中的定点等比平面族
3 . by using the dual concept between points and planes in 3d projective space , two classes of developable surfaces on c - b zier curve are constructed . the former is as a envelope of one - parameter plane family
Zier曲线上可展曲面造型的方法：一个是作为单参数平面族包络面的可展曲面构造，另一个是作为脊线的切线曲面的可展面构造。