用途打捞鱼顶变形，尤其对弯扁鱼头的遇卡油管更加有效。

It is more effective for fishing the blocked oil pipe with the distorted fish top, especially with flexing flat full head.

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本文对扁管压成弯管时容易起褶皱或折断的现象进行了理论上的探讨，并提出了解决这一问题的措施。

In this paper, the phenomenon that flat pipes are easy to be crumpled when they are extruded into bent ones is explored, and some methods are presented to solve this problem.

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