Anbieter: liu xing, Nanjing, JS, China
paperback. Zustand: New. Paperback. Pub Date: 2017-10-01 Pages: 108 Language: Chinese Publisher: the Yellow River water conservancy press. the working face in front of the coal mining unloading rule and its correlation and the gas migration using the rock mechanics. percolation mechanics. discusses the coalface ahead and unloading process and the gas migration of deformation and destruction of relevance. aims to grasp. Artikel-Nr. NI070966
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