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Octavya, Putri Elma, Unit of Mining, PT. Semen Indonesia (Persero) Tbk; 2General Directorate of Mineral and Coal, Ministry of Energy and Mineral Resources
Octavya, Putri Elma, Direktorat Teknik dan Lingkungan Mineral dan Batubara, Kementerian ESDM (Indonesia)
Octavya, Putri Elma, General Directorate of Mineral and Coal, Ministry of Energy and Mineral Resources
Oktantyo, Gumilang
Oktariansyah, Iwan, PT. TIMAH, Tbk.
Oktavianto, Hanung, Departemen Geotechnical & Hydrogeology PT Adaro Indonesia
Oktavianto, Hanung, Departemen Geotechnical & Hydrogeology PT. Adaro Indonesia
Oziana, Deea Rizki, Program Studi Teknik Pertambangan, Universitas Syiah Kuala
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