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【单选题】
在进行压杆的稳定性计算时,用查表法得到折减系数,若某材料压杆,当 λ =120 时,折减系数 φ =0.466 ;当 λ =130 时,折减系数 φ =0.401 。则当 λ =128 时,可得折减系数 φ 的数值为A.
φ =0.444
B.
φ =0.434
C.
φ =0.424
D.
φ =0.414
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