A logistic model is a standardized module that is used to regulate the cargo transportation, manage logistics facilities and equipments.
物流模数是用于规范货物运输、管理物流设施与装备的标准化模数。
Then, based on the symmetry of magnetic circuit of large power equipments, its simplified mathematical model of magnetic forces is discussed.
然后，基于电力设备磁路的对称性给出其磁场力简化数学模型；
Power load simulator is one of the necessary equipments in the dynamic model laboratory of power system.
功率负荷模拟器是电力系统动态模拟实验室不可缺少的设备之一。
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