Delivery of aggregate regarding the task titled “Design and execution of construction works ‘Modernization of railway line No. 354 Poznań Główny POD-Chodzież-Piława Główna'” as part of the Wielkopolska Regional Operational Program for the years 2014-2020Delivery of aggregate regarding the task titled “Design and execution of construction works ‘Modernization of railway line No. 354 Poznań Główny POD-Chodzież-Piława Główna'” as part of the Wielkopolska Regional Operational Program for the years 2014-2020