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• Permissible electrically operated pumps
• Effect of asymmetric wear of point attack bits on coal-cutting parameters and primary dust generation
• Surface evaluation of the 4M Miniminer System
• Conical bit rotation as a function of selected cutting parameters
• Device for in situ measurement of coal-cutting forces
• Longwall shearer performance using water-jet-assisted cutting
• Surface testing and evaluation of hopper-feeder-bolter