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Mine ventilation tubing system and method of installation
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Stretcher for use in mines
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Tool for installing cutting blades on graders
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Lock for trolley connector
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Method of and apparatus for moving electrically powered mining equipment
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Drill pipe handling apparatus
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Conveyor belt cleaner and method for cleaning a conveyor belt
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Switching and testing system
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Vibrating deep ripper
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Brake system
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Noise-suppressing air intake for ventilation fans
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Switching and testing system
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DC power control system
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Quenching method and apparatus
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Mine roof bolting
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Dust control system and method of operation
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Mine vehicle safety apparatus
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CA1143649A
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Dust control system
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Apparatus for producing coke from fine and coarse coal
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Safety apparatus for a mining machine
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