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PT Bukit Makmur Mandiri Utama | 230.596 pengikut di LinkedIn. Established in 1998, BUMA provides a wide range of coal mining services to Indonesian coal producers across all stages | Since our establishment in 1998, BUMA a wide range of coal mining services to some of the largest Indonesian coal producers across all production stages, including overburden removal, coal mining, coal hauling ... gawai dayak sanggau 2023