Grading Of Coal

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Sr. No. Title Date Document
11 BIS Is.9127.1.1992 Patrographic -
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12 Is.437.1979 -
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13 Grading of Lignite 23-01-2023A-Wn -
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14 BIS Is.1350.4.1.1974 Ultimate Analysis -
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15 BIS is.1350.4.1.1974 Coarbon and Hydrogen -
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16 BIS Is.1350.1.1984 -
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17 BIS Is.1353.1993 Caking Index -
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18 Is.770.1977 -
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19 Grading of Coal -
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20 BIS Is.1350.2.1975 Caloric Value -
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