1.
Study on the problem of possition relationships between plane and plane,straight line and straight line and straight line and plane in space;
空间中平面与平面、直线与直线及直线与平面间位置关系研究
2.
The projection sequence of plane graphs apex and relationship of the sequence and plane faces were discussed in this paper.
提出并论证了各种位置直线与平面相交,直线在相邻两投影面上可见性的投影规律。
3.
A line or plane perpendicular to a given line or plane.
正交线（面）一条或一个与给定直线或平面垂直的直线或平面
4.
A horizontal line or plane at right angles to the plumb.
水平线与铅锤线成直角的水平线或水平面
5.
a flat surface at right angles to a plumb line.
一个与铅垂线绝对成直角的平面。
6.
A vertical or nearly vertical line or plane.
垂直线，垂直面垂直或近似垂直的线或平面
7.
The angle or inclination of a line or surface that meets another at any angle but90=.
斜角，斜面一直线或平面与另一（直线或平面）相交所成的除90°外的任意角或倾角
8.
Normal Vector and Directional Vector are Used for Solving Space Problems or Linear Problems;
巧用法向量与方向量解决空间平面及直线问题
9.
The distance from the origin to the point at which a line, curve, or surface intersects a coordinate axis.
截距从原点到一条直线、曲线或平面上的点的距离，与坐标轴相交
10.
Of, relating to, or designating a line and a plane that do not intersect.
一线与一面平行的属于、有关或指出不相交的一条直线与一个平面的
11.
a section created by a plane cutting a solid perpendicular to its longest axis.
由一平面横切某物，通常与轴线成直角切割形成的断面。
12.
the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian.
天体的方位角是指包括它的垂直面与子午线平面之间的夹角。
13.
Two Theorems for the Real Line from the Crossing of Plane and Quadratic Cone and Their Application
有关平面与二次锥面相交成实直线两个定理及其应用
14.
With some angle between axes of pass and rolls, the flexture either on plane or on sides can straightened at one time.
孔型轴线与矫直辊轴线成一定的倾角，使得扁钢的平面弯曲及侧面弯曲一次性被矫直。
15.
A surface containing all the straight lines that connect any two points on it.
平面包含面上所有连接任意两点的直线的平面
16.
Lines pierce the sphere in points.
直线与球面相交为点。
17.
One of a set of parallel geometric figures, such as lines or planes.
平行线，平行面如直线或平面等一组平行的几何图形之一
18.
Something, such as a line, a plane, or an object, that is horizontal.
水平物水平的物体(例如水平直线,水平面线或水平物)