Supply, Installation And Commissioning Of One (1) New Weather Station At Mavrosouvalas Wells And Provision Of Maintenance Services, For The Five (5) Total Weather Stations, Four (4) Of Drainage Basins Of The Evinos, Mornos, Yilikis, Marathon Reservoirs And The New Station, The Placement Of Which Is Requested At The Mavrosouvala Wells, For A Period Of Five (5) Years, Including Supply Of The Spare Parts That Will Be Required For The Maintenance Of The Stations During The Above Period Of Time