European Open Procedure Pursuant To Art. 71 Of The Legislative Decree. 36/2023 For The Awarding Of Extraordinary Maintenance Interventions, Even In Emergency Conditions, Of The Networks Of The Milan Aqueduct, Of The Municipalities Of Peschiera Borromeo, S. Donato And Pero And For The Extraordinary And Emergency Maintenance Of Manhole Covers And Connections On Manufactures