Put the wheel hub on a turning device, make it whirl on the strength of one constant bending moment, make hub bear a whirling bending moment constantly.

• 将轮毂置于一旋转的装置上,使其可在一恒定不变的弯矩作用下旋转,使轮毂始终承受一个旋转弯曲力矩的作用。