Edison's system used a 110 V two-wire DC undergrounddistribution network.
此爱迪生电力系统采用110伏两线制地下配电网。
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How about a map showing the distribution of the dark honey fungus, whose underground filament network spans thousands of acres and might make it the largest organism in the world?
The solution pumps hot water from a power plant through underground pipes to heat exchangers which heat up water in the secondary distribution network and feed it into consumer radiator systems.