Straight wheels used for surface, cylindrical, internal, and centerless grinding.
用于表面、圆柱面、内部和无心磨削的直轮。
2
The sorts of structures of optical elements includes structures of Fresnel's surface, cylindricalsurface, spherical surface, aspheric surface, prism and trapezoid.
此种光学元件的结构种类包括锯齿状的菲涅尔面、柱面、球面、非球面、棱镜以及梯形等结构。
3
Most of the samples analysed by Ingrain start as cylindrical cores brought up from deep below the Earth’s surface by drills.