精密三角截面棱镜
precise triangular-section prism
等截面通道角形挤压
equal channel angular pressing
非标准带圆角矩形截面容器
nonstandard pressure vessels of rectangular cross section with round angles
角散射截面
angular scattering cross section probable
三角形截面弹芯
triangle cross-sectional projectile
双角钢组合截面
dual-angle steel combined section
二面角角反射体
Dihedral corner reflector
垂直截面面积
Perpendicular cross section area