Seller: liu xing, Nanjing, JS, China
Hardcover. Condition: New. HardCover. Pub Date: 2018-11-01 Pages: 631 Language: Chinese Publisher: Science Press Basic Theory and Application of Caving Coal Mining The basic theoretical problems and engineering applications of top coal mining technology. the system summarizes the author 20 Over the years. in the research results of more than ten coal mine groups and dozens of working faces. it is proposed to study the need for top coal mining. Seller Inventory # NL015275