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本文针对冷弯型钢的定长剪切控制问题，进行了综合论述，并且提出一种新的定长自动控制方式，避免了二次切割，精度明显提高，具有显著的经济效益。
In this paper, the problem of fixed-length shearing control of cold-formed steel is discussed, and a new automatic control method of fixed-length is proposed, which avoids the secondary cutting and improves the precision obviously with significant economic benefits.