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通过对离心泵反应系数ρk的分析，认为存在一个ρk值，使得泵的能量损失最小，并由此计算出最佳的叶轮外征D2和出口宽度b2。
Through the analysis of the reaction coefficient ρk of the centrifugal pump, it is considered that there is a ρk value, so that the energy loss of the pump is minimum, and the optimal impeller external characteristic D2 and the outlet width b2 are calculated.