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THE DISTRIBUTION AND CONTROL FACTORS OF THE RICH-COAL REGION IN PERIOD OF LONGTAN IN GUIZHOU PROVINCE
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1990, 18(4): 2-4.
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THE WEATHERED COAL AND OXIDIZED COAL IN ANTAIBU No.2 OPENCAST, PINGSUO MINING DISTRCT
1990, 18(4): 5-8.
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THE DISCOVERY OF THE PLANE OF UNCONFIRMITY UNDER THE BOTTOM SURFACE OF PINGDINGSHAN SANDSTONE AND THE PRELIMITARY DISCUSSION ABOUT THE BOUNDARY OF THE PERMIANTRIASSIC SYSTEM,HENAN PROVINCE
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1990, 18(4): 12-15.
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THE CHARACTERISTICS OF XUHUAI STRUCTURES AND COALFIELD PREDICTION
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1990, 18(4): 16-20.
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A TRIAL STUDY ON THE CHARACTERISTICS OF THE AQUIFERS IN THE BASE OF THE SOFT LAYERS IN THE NORTH ANHUI COALFIELD
1990, 18(4): 36-38.
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THE HYDROGEOLOGICAL CHARACTERISTICS AND CONTROL OF FRACTURE WATER IN SANDSTONE IN MINE
1990, 18(4): 39-41.
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THE CHARACTERISTICS OF CHANNEL WAVES IN COAL SEAMS IN LIANSHAO COAL MINING AREA
1990, 18(4): 48-56.
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IMPROVEMENT OF THE COMBINED SONDE OF THE MT.SOPRIS Ⅲ DIGITAL LOGGING SYSTEM
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1990, 18(4): 57-60.
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DETERMINATION OF POSITION OF THE OUTER RING INSERTAPERTURE ON STRUT-TYPE BIT WITH MIULTIPE-UNIT PLATE
1990, 18(4): 61-64.
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