The fundamental structure and design method of four rolls universal mill stand are put forward.

给出了四辊万能机架的基本构造及设计方法。

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This universal mill stand can be used not only in a new welded steel pipe mill to be designed but also in the reform to old welded steel pipe mill.

这种机架不仅可以用于新设计的焊管机组中，而且还可以用于对现有焊管机组的改造。

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