Coal. Analysis and types. Terms and definitions
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Coal. Terms and definitions
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Coal. Terms and definitions
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Coal. Preparation. Terms and definitions
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Peat. Geology, prospecting and exploration of peat deposits. Terms and definitions
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Peat. Terms and definitions
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Iron and manganese ore products. Terms and definitions
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Rack. Terms and definitions
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Mining. Mine shafts. Terminology (recommended)
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Rocks. Terms and definitions
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Mica. Defects. Basic terms and definitions.
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Heterogeneity of oil bed. Types. Terms and definitions.
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