“Finding the Optimal Preventive Maintenance Time for the Second South Baghdad Gas Electricity Distribution Station Using Reliability Function Techniques” (2025) Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 56(1), pp. 166–170. doi:10.55562/jrucs.v56i1.15.