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Drawbridges (Pdybmdjd)

Computer viruses ()
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)
                        Movable bridges (Pdybmdj)
                            Bascule bridges (Pdybmdjb)
                                 Related Term (Associative): Computer viruses ()
                            Drawbridges (Pdybmdjd)
                            Lift bridges (Pdybmdjm)
                            Swing bridges (Pdybmdjs)