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对美国水力学会粘度换算图进行数字化后提出的数学公式，可以替代图表法换算离心泵输送粘性液体时的性能，通过两个实例验证了本文提出的数学公式具有较好的精度。
The mathematical formula proposed by the American Hydraulics Society for Viscosity Conversion can be used instead of the chart method to calculate the performance of the viscous liquid delivered by the centrifugal pump. The two examples prove that the mathematical formula proposed in this paper has better accuracy.