With the new method, a minimal path feeder vector can be constructed to produce reliability indexes of a complex distribution system with sub feeders and alternative suppliers.

该方法以构造负荷点供电“最小路馈线段行向量”的方法，方便地求得带子馈线、备用电源的复杂配电网络的可靠性指标。

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The hardware of the system comprises the five sub-systems, i. e. welding power source, arc length controller, welding wire feeder, welding head traveller and detector.

此系统的硬件主要包括五个子系统，即：焊接电源、弧长控制器、送丝机构、焊矩行走机构和检测机构；

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Then divides the highway network into four levels: main trunk line, sub-trunk, feeder and connecting line, and also positions functions of the four levels.

进而按照通达程度将公路网划分为四个等级：主干线、次主干线、支线和连接线，并分别对四个层级进行了功能定位；

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