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PPPTMGB "LEMIGAS"
Dr.Ir. Djoko Surono Widodo
PERTAMINA OEP KARANGAMPEL
Dr. Ir .Bambang Widarsono
Department of Refining Chemistry Indonesian Petroleum Institute
Process Laboratories Oil and Gas Technology Research Development “Centreâ€
BUKIT BAIDURI ENTERPRISE, PT
MEARES SOPUTAN MINING, PT