等角三角形命题
equiangular triangleproposition
等腰直角三角形波导
isosceles-right triangular waveguide
等腰直角三角形网
right-triangle irregular network
复数矢量三角形法
complex number vector tria ngle method
轨迹三角形法
Trajectory triangulation of lines
联系三角形法
connection triangle method