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应用张克武气体氩模型理论微分方程，导出液体粘度理论方程和“正烷烃沸点下的粘度值相同”的定理。本法以４０种不同构型２５８种无机、有机、强缔合性的醇、酸、二醇及非极性纯质１５２８个实验数据检验，平均误差１．８５％。其精度比著名的Ｖａｎ Ｖｅｌｘｅｎ ｅｔ ａｌ．法高９倍以上达到实验允许误差范围内。解决了近百年来无法精确计算的液体粘度这个技术科学上的关键难题。有重大理论意义和重要应用价值。
The theoretic equation of liquid viscosity and the theorem of “the same viscosity at normal boiling point of n-alkane” are deduced by using Zhang Kewu differential equation of gas argon model theory. This law with 258 kinds of different configurations of 258 kinds of inorganic, organic, strong association alcohol, acid, diol and non-polar pure 1528 experimental data test, the average error of 1.85%. Its accuracy than the famous Van Velxen et al. Law higher than 9 times the experiment to allow the error range. Solved the nearly 100 years can not be accurately calculated viscosity of the liquid the key scientific and technological problems. It has great theoretical significance and important application value.