kohesi coal batubara
asam asam project coal mining Tambang Batubara Bukit Asam PTBA Indonesia . PT Tambang Batubara Bukit Asam Tbk (Bukit Asam), a state controlled company, is one of the largest coal mining companies in Indonesia. It has coal mines covering 66,414 hectares in South Sumatra, 2,950 hectares in . Get Price