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。
A conic section whose plane is not parallel to the axis base or generatrix of the intersected cone.
服务附楼的屋顶是一个圆锥的一部分，顶部半径大，底部半径小。
The roof of the service wing is a segment of a cone with a larger radius at the top and a smaller radius at the bottom.
机床。主轴头和干燥机架卡盘的连接尺寸。第1部分：圆锥形连接。
Machine tools - Connecting dimensions of spindle noses and work holding chucks - Part 1: conical connection.
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