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https://lviv.dotnet.city/2010/12/%d0%bf%d0%b0%d1%82%d0%b5%d1%80%d0%bd-%d0%b2%d1%96%d0%b2%d1%82%d0%be%d1%80%d0%ba%d0%b0-20-%d0%b0%d0%b1%d1%81%d1%82%d1%80%d0%b0%d0%ba%d0%bd%d1%82%d0%b0-%d1%84%d0%b0%d0%b1%d1%80%d0%b8%d0%ba%d0%b0-ab/
"Патерн Вівторка" #20: Абстракнта Фабрика (Abstract Factory)