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1. Study On Maceral Separation And Characteristics Of Maceral Concentrates For Kailuan Coking Coals
2. Study On The Maceral Crushing And Liberation And On The Coal Blending Coking For Gas Coal
3. Production Characteristics And Productivity-enhanced Methods For Different Extra Heavy Oil Reservoir
4. Study On The Influence Of Micro Crack Difference Of Crushed Materials On Grinding And Dressing Process Of Magnetite Ore In Eastern Hebei Province
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