书页通常使用的材料是羊皮纸，羊皮纸是一种动物的皮肤，其在张力的作用下被拉伸和变干，因此它会变得非常平整，并且你可以在上面写字。

The material typically used for the pages was parchment, which is animal skin that's stretched and dried under tension, so it become s really flat and can be written on.

youdao

MARE建立了平整分卷机组中张力装置的非线性有限元模型，通过实验验证，证明了模型的准确性与可靠性。

MARE, a nonlinear finite element modeling of the tension device in the skin pass mill for hot strip was built. The accuracy and reliability of this model was proved by experiments.

youdao

主要制作LDPE、HDPE的平口袋的设备。无张力，烫线平整美观。

The main production of LDPE, or HDPE bottom bags device. Without pulling.

youdao