Upkeep, Maintenance And Cleaning Work On Rainwater Evacuation Channels To Combat Urban Flooding In The Main Towns Of Municipalities Divided Into Three (03) Lots (Framework Contract). – Lot 1 Urban Commune Of Antananarivo, Analamanga Region – Lot 2 Urban Commune Of Mahajanga, Boeny Region – Lot 3 Urban Commune Of Toamasina, Atsinanana Region