Research on deformation of upper coal seam based on ascending mining
Zhao Baofeng;Wang Qinghu;Zhang Weijun;Xi’an Research Institute of China Coal Technology & Engineering Group Corp;Shanxi Key Laboratory of Preventing and Controlling Coal Mine Water Hazard;School of Environmental Studies;China University of Geosciences;Maiduoshan Coal Mine;Shenhua Ningxia Coal Group Company Limitid;
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Synthesis of carbohydrazide
Liu Junfeng;Wang Shenghua;Jin Ling;School of Chemistry and Chemical Engineering;Key Laboratory of Theoretical Organic Chemistry and Function Molecule;Ministry of Education;Hunan University of Science and Technology;
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