多边形交并差
union and subtraction of polygons
Intersection
多边形边界约简
polygonal boundary reduction
球面等边多边形拼接
spherical equilateral polygon joint
多边汇率模式
multilateral exchange rate model
多边汇率模型
MERM multilateral exchange rate model
两个多边形的交、并、差
and difference of two polygons
Union
Intersection
正交凸线多边形
orthogonally convex rectilinear polygon