Maps (on paper or on the screen) are flat surfaces; they require a transformation from the curved surface of the earth to the flat plane: a map projection.
纸上或屏幕上的地图是平面的；它们需要从地球的曲面向平面进行转换：地图投影。
Map projection in cartography is a way to present a two-dimensional curved surface on a plane, such as a normal map. Figure 2 shows a Traverse Mercator projection.
绘图法中的地图投影方法可以在平面中表示一个两维的曲面，例如一个标准地图。
Wind pressure distributions on spherical shell or curving roofs can be obtained by the method of coordinate transform or projected plane of curved surface.
并且通过坐标变换或投影平面代替曲面等方法可以处理球壳及曲面屋盖的风压分布插值计算。
The distribution patterns of underground coal seam is diversified. The plane distribution is only one of the simple curved surface distribution patterns.
地下开采煤层的分布形式多种多样，平面分布仅是曲面分布形式中的一种简单情况。
Earth is an ellipsoid and its surface is curved, but the maps are usually drawn to the floor plan on paper. So before drawing you must spread the curved surface surface to the plane first.
地球椭球体表面是曲面，而地图通常要绘制在平面图纸上，因此制图时首先要把曲面展为平面。
This paper presents one kind of numerical method of tunnel engineering and discusses a numerical method for finding the intersection of curved surface and plane in space and its application.
给出了隧道工程的一类数值方法。讨论了求空间曲面与空间平面交线的一种数值方法及其应用。
Can be shaped in the plane or three-dimensional, curved surface such as printing, transfer printing full-color graphics, no color printing, the image clear and beautiful, colorful and timeless.
可在平面或异型立体、曲面等承印物表面，实现全彩色图文转印，无需套色，图像清晰美观，色彩鲜艳历久弥新。
This paper describes 3-D curved surface, such as wave-surface etc, on 2-D plane by using hidden-line method.
本文用带消隐线的方法在二维平面上来描绘三维曲面，例如波表面等。
The common calculating methods, i. e. using periodic boundary condition and curved surface replaced by flat plane, were discarded.
摈弃了目前国际上通常采用的周期边界条件，以及以平板代替曲面的做法。
Because there exists a chip-curling groove on the rake face, the rake face of a modern cutting tool used on NC machine tool is not a plane, but a curved surface.
由于现代数控刀具都设计有卷屑槽，从而使其前刀面不是平面，而是曲面。
The company possesses special manufacturing technologies for high-precision grinding and polishing machine for plane surface, spherical surface, curved surface and semi-cylinder.
公司拥有高精度系列平面、球面、曲面、半柱面等研磨抛光设备的高抛、低抛、双面抛专业生产技术。
The company possesses special manufacturing technologies for high-precision grinding and polishing machine for plane surface, spherical surface, curved surface and semi-cylinder.
公司拥有高精度系列平面、球面、曲面、半柱面等研磨抛光设备的高抛、低抛、双面抛专业生产技术。
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