共 50 条
- [42] The main features of mechanical coal mining in coking coal mining in North America ZEITSCHRIFT DES VEREINES DEUTSCHER INGENIEURE, 1928, 72 : 678 - 680
- [43] Mining Impacts of Coal Seam Group Mining on Adjacent Roadways in Coal Seam PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON MINE SAFETY (2012), 2012, : 502 - 506
- [45] Cooperative agreement is to develop coal gasification ADVANCED MATERIALS & PROCESSES, 2007, 165 (10): : 19 - 19
- [46] THE JACKSONVILLE AGREEMENT: QUEST FOR STABILITY IN COAL INDUSTRIAL & LABOR RELATIONS REVIEW, 1955, 8 (02): : 195 - 203
- [47] OUTLOOK ON COAL RESOURCES AND COAL MINING TECHNOLOGY ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1979, (APR): : 8 - 8
- [48] ANTHRACITE COAL WAGE AGREEMENT OF 1916 MONTHLY REVIEW OF THE US BUREAU OF LABOR STATISTICS, 1916, 2 (06): : 572 - 575
- [49] Concentration in Coal Mining and Prussian Law on Mining ARCHIV FUR SOZIALWISSENSCHAFT UND SOZIALPOLITIK, 1905, 21 (02): : 417 - 476
- [50] Research Review of Coal mining on the coal Village CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING, PTS 1-4, 2014, 838-841 : 1821 - 1825