检测圆锥管螺纹基面中径的方法有很多，但测量过程复杂。

There are many ways to measure base-level pitch diameter of cone-shaped thread.

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该机床能对圆管、方管和圆锥管等管材进行空间加工，以使工件能精确的组合连接。

The machine can perform space cutting action on round, square, and cone tubes to make parts combine and connect exactly.

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目的：探讨圆锥马尾部室管膜瘤的诊断及手术治疗特点。

Aim: To study the diagnosis and treatment of ependymoma in conus medullaris and cauda equins.

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