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Transmission lines (Pmptm)

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Facilities (P)
     Use For: Complexes; Installations
    Transportation, hydraulic and utility facilities (Pm)
        Electric utility facilities (Pmp)
            Electric power transmission facilities (Pmpt)
                Transmission lines (Pmptm)
                     Use For: Electric lines; Electric transmission lines; Power lines; Telephone lines
                     Related Term (Associative): Contact wire (Pmuc)
                    Grids (Transmission lines) (Pmptmg)
                         Use For: Grid systems
                    Overhead utility lines (Pmptmp)
                    Underground utility lines (Pmptmu)
                         Related Term (Associative): Underground structures (Pdv)
                Utility poles (Pmptp)
                     Use For: Electric utility poles
                Electric substations (Pmpts)
                     Use For: Substations
                Electric transmission towers (Pmptt)