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batu bara coking coal 2014

Astra International | Tentang Astra - Sejarah Astra

2016 • Astratel memiliki 25% saham PT Trans Bumi Serbaraja, BUJT ruas tol Serpong-Balaraja sepanjang 30km. • Bank Permata menyelesaikan Rights Issue dan memperoleh dana sebesar Rp5,5 triliun untuk memperkuat permodalannya.

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Coal - Wikipedia

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams.The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure.

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