The best electric circuit of converter is the tandem switch dropping-voltage circuit .

而变换器的最佳电路结构是 串联 开关降压电路。

The author especially analyzes the problems of making use of the current network resources optimization of network structure and improvement of the Tandem Switch .

对充分利用现有网络资源，优化网络结构，加强 汇 接 局 层面的建设的问题进行了重点分析。