زمان مطالعه: < 1 دقیقه
Some of the completed projects in the tunnel and bridge sector: construction of the Aburihan overpass bridge in Tabriz, construction of the Jolfa border bridge, construction of the Akhoni four-way overpass bridge in Tabriz, creation of a flat network outside and inside the tunnel, and preparation of billets and longitudinal and transverse sections of the Tabriz urban train route
