The paper introduced some debugging problems and solving methods according to DC speed regulating system of reversible magnetic field and logical control without circular current.
针对磁场可逆的逻辑无环流直流调速系统，介绍了调试过程中出现的一些问题及处理方法。
Since the tax federalism, current local taxation system has played an important role in ensuring local financial revenues and regulating economic operation.
分税制实行以来，现行地方税制对确保地方财政收入和调控经济运行发挥了重要作用。
According to the adjusting principle of current bi-colsed, PLC and 6ra70 digital DC speed regulating device is adopted, which controls over the system of the rolling mill.
根据电流双闭环调速原理，采用6ra70直流全数字调速装置与P LC结合，控制材轧机电系统。
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