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GB/T 478-2008 Method for float and sink analysis of coal 煤炭浮沉试验方法 - 英文版 |
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GB/T 7702.17-1997 Standard test method for granularactivated carbon from coal--Determination of floatation ratio 煤质颗粒活性炭试验方法 漂浮率的测定 - 英文版 |
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