Using traditional manual method, sag calculation is complex and liable to make mistakes.
传统的手工计算弧垂方法不仅计算量大，而且容易出错。
Using traditional manual method, sag calculation is complex and prone to making mistake.
传统的手工计算弧垂的方法不仅计算量大，而且容易出错。
Using traditional manual method, sag calculation is complex and prone to making mistake.
传统的手工计算弧垂的方法不仅计算量大，而且容易出错。
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