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Enugu Nigeria Africa Small River Pebble Cement Mill For. Large diabase ball mill in Enugu Nigeria Africa large diabase ballmillinEnugu Nigeria Africa,History of coal mining inenugunigeriaining of coal inenugureally started in 1916 with the ogbete mine and later other mines like the ribadu onyeama and okpara mines were opened up history of coal mining inenugu nigerianigerian coal corporation