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Rabiu A. Abubakar; Sani Umar Haruna; Saidu Abdu Kadawa; Ozor Marcellinus Chijiume4; Aliyu Usman Ibrahim. Design and Fabrication of a Portable Drilling Rig for Residential Building Water Projects and Agricultural Irrigation Boreholes. Scientificjournal 2026, 1, 01-18.