Task No. 1 And 2: Replacement Of The Traction Network Driving Ducts With A Set Of Accessories In Selected Locations In The Operation Of The Railway Lines Department In Ostrów Wlkp. Task No. 3: Replacement Of The Road Wires And The Load -Bearing Rope Of The Overhead Contact Line With A Set Of Accessories In Selected Locations Within The Operation Of The Railway Lines Plant In Ostrów Wlkp.