A conic section whose plane is not parallel to the axis base or generatrix of the intersected cone.
圆锥的一部分，其切面既不平行于轴和基面，也不平行于圆锥母线。
The direction of the axis changes gradually so that it traces out a cone in space.
轴的方向逐渐在变，导致了轴的空间描绘出一个圆锥。
The H-project of a cone whose axis is parallel to V-plane is analysed.
分析了圆锥轴线为正平线时，在水平面投影图中轮廓线的投影。
A series of seismographs are arranged with their direction of vibration along the generators of a cone with vertical axis.
一组地震仪的振动方向是与具有垂直轴的锥体拾震器方向一致的。
Xuan Sefa a cone-shaped pieces of the hoist and around the center line perpendicular to the axis of rotation pipeline, completed the hoist valve action.
的启闭件呈锥形，并绕垂直于管道中心线的轴线旋转，完成阀门的启闭动作。
Xuan Sefa a cone-shaped pieces of the hoist and around the center line perpendicular to the axis of rotation pipeline, completed the hoist valve action.
的启闭件呈锥形，并绕垂直于管道中心线的轴线旋转，完成阀门的启闭动作。
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