开卷的英文：
decoil

The uncoiler is driven by DC motor through gearbox and equipped with hydraulic and lubricating system.
开卷机由Z4型直流电机通过齿轮箱传动,配有液压系统和润滑系统。

Open a book may not necessarily be beneficial, if one doesn't do it right, it may cause harm.
开卷未必有益，搞不好还有害。

The uncoiler and pinch rolls work together delivering the strip end to the shear.
开卷机及夹送辊同步工作送带钢头部至剪切机。

That is a good book, which is opened with expectation and closed with profit. ——Amos Bronson Alcott
好书开卷引人入胜，终卷使人受益。——亚尔葛特