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Noun infrastructure has 2 senses
infrastructure, substructure - the basic structure or features of a system or organization--1 is a kind of structure
 --1 is a part of system
 
infrastructure, base - the stock of basic facilities and capital equipment needed for the functioning of a country or area; "the industrial base of Japan"--2 is a kind of store, stock, fund
 --2 has parts:
 |  | communication system, communication equipment; fire station, firehouse; gas system; main; penal institution, penal facility; power system, power grid, grid; public works; school system; sewage system, sewer system, sewage works; transportation system, transportation, transit; water system, water supply, water | 
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