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The device can be used to reduce the two peaks of crankshaft net torque by the balancing of the counterbalance hanging on the back end of the pumping bot. 这种装置通过是挂在抽油机后端的平衡重的平衡作用，降低一次平衡曲柄轴净扭矩的两个峰值，达到减少能耗提高效率的目的。