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Spilpunt: Congo (Kinshasa)- barite crusher usa , · The DRC's formal economy is dominated by the mining sector. Minerals account for the vast majority of exports and represent the single largest source for foreign direct investment (FDI).Spilpunt: Congo (Kinshasa) · The DRC's formal economy is dominated by the mining sector. Minerals account for the vast majority of exports and represent the single largest source for foreign direct investment (FDI).