Development Of Construction And Executive Designs Including The Construction Of Pt Cpk And Pt Dmosin Traction Substations Powering The Lk85 Warszawa - Cpk - Łódź Section And Pt Kuźnica-Czajków Powering The Lk86 Sieradz - Wrocław Section With An Option For Additional Power Supply Substations Lk85 And 86.