#electric_main  a main that distributes electricity
  supertype:  #main  a principal pipe in a system that distributes water or gas or electricity or that collects sewage
  part of:  #power_system__powersystem__power_grid__powergrid__grid  a system of high tension cables by which electrical power is distributed throughout a region
     part of:  #infrastructure__base  the stock of basic facilities and capital equipment needed for the functioning of a country or area; "the industrial base of Japan"

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