According to the invention, each drawing roller (2.1, 2.2) is controlled to a prescribed motion value.

根据本发明设定，将每个拉伸辊(2.1、2.2)控制到规定的运动值。

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According to the invention, each drawing roller (2.1, 2.2) is controlled to a prescribed motion value.

根据本发明设定，将每个拉伸辊(2.1、2.2)控制到规定的运动值。

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