采用编码器测量行程，计算并显示带卷直径，保证带卷对推开卷机卷筒中心。
Using encoder to measure stroke, to do calculation to display coil diameter so that the coil can be guaranteed to align with the centre of uncoiler barrel.
在冷轧机上，开卷机将钢卷打开，然后将钢带引入五机架连轧机轧成薄带卷。
In the cold rolling mill, coil open-book will open the machine, and then strip the introduction of a rolling mill stand even with volumes thin.
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