Coal ranks in the Yuanyanghu mine area are mainly non-caking coal, long flame coal the second, all good coals for coal chemical industry and power plant.
鸳鸯湖矿区以不粘煤为主，长焰煤次之，是良好的煤化工和动力用煤。
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Must ensure that non-caking.
必须确保无结块。
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