directrix

directrix

1. a fixed point whose relationship with a directrix determines a conic section

一个与准线的关系决定圆锥形状的定点

2. principal and subordinate directrix

主从准线

3. directrix of a conic

二次曲线的准线

4. The directrix line of a conic.

二次曲线的准线。

5. directrix plane

准平面

6. directrix curve

准曲线

7. A solid bounded by two parallel planes and such a surface, especially such a surface having a circle as its directrix.

圆柱体由两个平行平面和这样的表面，特别是有一个圆作为其准线的平面所形成的柱体

8. a solid bounded by two parallel planes and such a surface,especially such a surface having a circle as its directrix

圆柱体，由两个平行平面和这样的表面，特别是有一个圆作为其准线的平面所形成的柱体

9. Constructing Directrix for Conic Curve

圆锥曲线准线的几何作图

10. 6.Based on the geometry characteristics of Bertrand surfaces, the complicated surface conjugation issue can be discussed with their directrix line.

基于白川德曲面的几何特征，将复杂的曲面共轭问题归结到准线上来讨论。

11. Developable Surfaces Generated by a Directrix

导线生成的可展曲面

12. 9.The surface generated by a straight line, the generator, passing through a fixed point, the vertex, and moving along a fixed curve, the directrix.

摘要重力式码头沉箱安装的位置与施工准线的偏差过大，会影响上部结构胸墙的竖直度，进而影响到码头观感质量。

13. Cure Guidance Directrix

曲线导航线

14. The surface generated by a straight line intersecting and moving along a closed plane curve, the directrix, while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix.

柱面一条直线与一个封闭的平面曲线相交及沿着平面曲线移动所形成的平面，准线则与一个不在此准线平面上或者不与此准线平面平行的固定直线保持平行

15. the surface generated by a straight line intersecting and moving along a closed plane curve,the directrix,while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix

柱面，一条直线与一个封闭的平面曲线相交及沿着平面曲线移动所形成的平面，准线则与一个不在此准线平面上或者不与此准线平面平行的固定直线保持平行

16. The coastline is the base directrix divides the region of sea and land management.

海岸线是划分海洋与陆地管理区域的基准线。

17. scroll directrix

涡卷准线

18. A fixed point whose relationship with a directrix determines a conic section.

焦点一个与准线的关系决定圆锥形状的定点

19. directrix of a linear congruence

线性线汇的准线

20. The guidance signal of vision guidance system consists of the lateral deviation and the orientation deviation between the guidance directrix and the vehicle axis.

视觉导航系统的导航信息是指导航线与车辆轴线的侧向位移偏差和角度偏著。

21. The surface generated by a straight line, the generator, passing through a fixed point, the vertex, and moving along a fixed curve, the directrix.

锥面由一条直线，即母线，通过一固定点，即顶点，沿一给定曲线，即准线，连续移动而产生的平面

22. The surface generated by a straight line,the generator,passing through a fixed point,the vertex,and moving along a fixed curve,the directrix.

锥面由一条直线，即母线，通过一固定点，即顶点，沿一给定曲线，即准线，连续移动而产生的平面。