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Ballast crib (Pmudkb)

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)
                    Ballast crib (Pmudkb)
                    Crossovers (Pmudkd)
                    Frogs (Railroads) (Pmudkh)
                    Rail (Railroads) (Pmudkr)
                         Use For: Railroad rails
                    Sidings (Railroads) (Pmudks)
                    Switches (Railroads) (Pmudkt)
                         Use For: Switchgear
                    Railroad ties (Pmudku)
                         Use For: Cross ties; Sleepers; Ties
                    Tie pads (Pmudkv)
                    Tie plates (Pmudkw)
                    Railroad turnouts (Pmudkx)