Tenders are invited for National calls for tenders : notice of national call for tenders open under emergency procedure no. 17/aono/p-akga/cdpm-nm/2025 of november 18, 2025, for the execution of the development and equipment works of the specialized training center in the public works areas of akonolinga, in the department of nyong and mfoumou, central region: construction of a mini drinking water supply system (aep) from a boring with solar energy