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Elevators (Pbpym)

Computer viruses ()
Facilities (P)
     Use For: Complexes; Installations
    Structures (Pb)
         Use For: Buildings
        Structural parts (Pbp)
             Related Term (Associative): Equipment (Qt)
            Transportation systems in buildings (Pbpy)
                Elevators (Pbpym)
                     Use For: Lifts (Elevators)
                Escalators (Pbpys)