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介绍了板料90°角弯曲展开经验公式L=l1+l2-2×t,并从理论上证明其合理性,给出了经验公式的使用建议。
The empirical formula L = l1 + l2-2 × t of bending and unfolding at 90 ° is introduced, and its rationality is theoretically proved. Finally, some suggestions on the use of empirical formula are given.