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原帖由 niuershiye 于 2008-8-12 23:10 发表 登录/注册后可看大图 按原始条件, 查得 fpt = 20 (μm) M =-20 N =-25 , Ens = -0.4 Eni=-0.5 (GB 10095-88) Wk(12) = 494.9009 , 按新标准算法 Ebns(i)= Esns(i)* cos α= -0.4 (-0.5)* cos α = -0.376 (-0.470)
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