Open Procedure Aimed At Signing A Framework Agreement Pursuant To Art. 59 Of The Legislative Decree. 36/2023 Lasting Four Years Relating To Services On Request With An Indefinite Quantity Of Maintenance And Overhaul Of The Electrical Systems And Electrical Machines Of The Uu.Nn., Smaller Vessels, Tugboats, Floats And Docks Of The Italian Navy And Of Public And Private Shipowners