所述的多棱针为三棱针。
外侧加力,三棱针刚度最小,残余变形居中。
Lateral loading, the rigidity of triangular needle was smallest, its rem-nant deformation was medium.
外侧加力,三棱针刚度最小,残余变形居中。
Lateral loading, the rigidity of triangular needle was smallest, its rem-nant deformation was medium.
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