"Design, Delivery, Construction, Author Supervision And Commissioning (Engineering) Of A Facility: "Reconstruction Of A Part Of A Passable Collector On The 2Nd City Highway Along "Istoria Slavianobulgarska" Street From "Nesho Bonchev" Street To "Nesho Bonchev" Street Zavodska" - 850 M. And Main Heating Pipeline Through "Zavodska" Street To "Industrialna" Street Dn1000 With A Length Of 300 M And Replacement Of 2 Br. Dn700 Electrically Operated Valves""