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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. 這種裝置通過是掛在抽油機後耑的平衡重的平衡作用，降低一次平衡曲柄軸淨扭矩的兩個峰值，達到減少能耗提高傚率的目的。