Because the tool bit and the tool bar are is fixed together by the tapering shape positioning device the tool bit can be dismounted from the tool bar to make a multi-purpose tool bar .

由于刀头和刀杆是用 锥 式定位装置固定在一起的，所以刀头可以从刀杆上拆卸下来，使得一刀杆多用。

Especially when the initial length of the fused zone is known the solution can predict the whole tapering shape curve with an arbitrary elongating length .

应该指出：只要已知初始熔融区长度，获得的解能预知任意拉伸长度下的 拉 锥 锥形曲线。