片语
isogonal basis等角基
isogonal spiral等角螺线
isogonal mapping等角映射
isogonal lines等角线对
isogonal trajectoryWhen a family of curves intersects another family at a specific constant angle α, the first family is referred to as an isogonal family of the second one, and in this case it is said that every family is an isogonal trajectory of the other. It is assumed that α is different from π/2; if α=π/2 both families are orthogonal.
isogonal transformation保角映射
isogonal map正角地图
isogonal surface等角曲面
isogonal bases等角基