drilling for drinking water is essential for the exploitation of different varieties of production during the dry season. the Sahelian zone is sandy and the water in the backwaters dries up during the first quarters after the rainy season. water is a source of life and wealth.Efan Mali multi-service agro-industry company.Bamako (Mali)Phone:+223-76-58-17-19/watssap:+223-66-25-09-96efanmali01@gmail.com