最后讨论了空心锥顶端受力的问题。
在上面的图中，两个空心锥单线之间的一段，可只要需要，但它必须是相当直。
In the above diagram, the single-wire section between the two hollow cones can be as long as desired, but it must be fairly straight.
该改锥是由锥柄盖、空心锥柄、锥杆、锥杆套、永久磁铁和多个不同规格尺寸的改锥头组成。
It is composed of a taper shank cap, a hollow taper shank, an awl perch, an awl stem casing, a permanent magnet and screwdriver heads of different format dimensions.
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