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Types of bridges by use (Pdybmu)

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Facilities (P)
     Use For: Complexes; Installations
    Specialized facilities (Pd)
        Bridges and culverts (Pdy)
             Related Term (Associative): Highway facilities (Pmr)
            Bridges (Pdyb)
                Types of bridges (Pdybm)
                    Types of bridges by design (Pdybmd)
                    Types of bridges by material (Pdybmm)
                    Types of bridges by use (Pdybmu)
                        Historic bridges (Pdybmuf)
                             Related Term (Associative): History (TCH)
                        Highway bridges (Pdybmuh)
                             Use For: Elevated highways
                        Military bridges (Pdybmum)
                        Footbridges (Pdybmup)
                             Use For: Foot bridges; Pedestrian bridges
                             Related Term (Associative): Walkways (Pmrtpw)
                        Railroad bridges (Pdybmur)
                             Use For: Elevated railroads
                             Related Term (Associative): Railroad facilities (Pmu)