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研究了立式反击破碎机主轴的动平衡问题，指出可rrrrrrrrrn用加减平衡重的方法使主轴实现惯性力和惯性力矩的完全平衡。
The dynamic balance of vertical counterattack crusher main shaft is studied, and it is pointed out that the main shaft can realize the inertial force and moment of inertia by adding and subtracting balance weight The perfect balance.