垂直 perpendicular; vertical; squareness; verticality; perpendicularity 两线垂直相交。the two lines meet at right angles. 设 ab 垂直于 cd。let ab be perpendicular to cd. 当表面与射线垂直时,射线的强度最大。when a surface is perpendicular to the rays, their intensity is at its maximum
Paper , board and pulps - measurement of diffuse reflectance factor diff o - geometry 漫反射因数测定法漫射垂直法
Paper , board and pulps - measurement of diffuse reflectance factor diff geometry 纸纸板和纸浆漫反射因数的测定漫射垂直法
Road vehicles . heads for fuel filters with vertical flange for compression ignition engines . mounting and connecting dimensions 道路车辆.压燃内燃机用带垂直法兰的燃油滤清器头.安装和连接尺寸