【简答题】
求下图所示弯曲件的坯料展开长度. <img src="https://nimg.ppkao.com/2018-09/wangjing/2018091709061065590.jpg?sign=bc4f077340143fde905566d00f850d06&t=62e91a1e" />
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A、试计算如图所示弯曲件的毛料展开长度。(已知位移系数K=0.39)
<img src="https://img.ppkao.com/2019-04/wangjue/2019041414463434363.jpg" />