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推导出描述多相琉体进泵运动规律的偏微分方程组，提出了用“动态”法计算泵充满程度的新方法，用数值差分法进行求解，给出了多种参数与泵充满程度的关系曲线。
A new method of calculating the fullness of pump with “dynamic” method was proposed. The numerical difference method was used to solve the problem. Some parameters and fullness of the pump were given Relationship lines.