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1·This paper according to working principle and characteristics of four-rolling mill, maintain several method to measure the thickness of coiled sheet which is moving.

根据四辊轧机的工作原理和特点，提出了借助气动元件控制测量力、并利用磁栅传感器进行精密测量的实现方案。

2·The results show that gaps and tension of degrease in sheet steel to coil can lead to biggish thermal stress. In addition, gaps in coiled sheet steel make more influence on bonding.

分析结果表明，钢卷成形时层间间隙和脱脂张力都会引起较大热应力。