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Rail components (Pmudkrk)

Computer viruses ()
Facilities (P)
     Use For: Complexes; Installations
    Transportation, hydraulic and utility facilities (Pm)
        Railroad facilities (Pmu)
             Related Term (Associative): Railroad tunnels (Pdvtrr); Railroad bridges (Pdybmur)
            Railroad tracks (Pmud)
                 Use For: Tracks
                Track components (Pmudk)
                    Rail (Railroads) (Pmudkr)
                         Use For: Railroad rails
                        Types of railroad rail (Pmudkrb)
                        Rail components (Pmudkrk)
                            Rail joints (Pmudkrkj)
                            Railhead (Pmudkrkr)