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Ze studjow rad petrograficzna budowa kamiennego
Wplyw dlugosci drogi hamowania na koncentracje przewozu glownego w podziemiach kopaln
World's longest single flight belt conveyor
With mechanical loading, cars can be manipulated if face be well shot and trips available
With hand shoveling 10 tons per man and 26 tons per loader already attained
What Is outlook for railroad coal traffic?
Weathering of coals for Government Railway use
Virginian Ry. builds double car-dumper coaling pier
Utilization of pulverized fuel on board ships
Use of trolleyphones speeds mainline haulage
Use of pulverized coal as steamship fuel
Use and handling of mine cars in british collieries
Unusual conversion at brightlingsea shipyard
Unit trains cut coal costs to three plants
Unit train -- Planning, operating, financing
Underground transportation in coal mines
Underground railroading at Mathies
Underground photography as aid to accident prevention
Underground haulage with locomotives and mine cars
Underground haulage with locomotives and mine cars
Underground haulage by locomotives
Underground aerial cableway for transportation of passengers
Twenty-seventh annual review and progress number
Twenty-seventh annual review and progress number
Trucks making heavy inroads into short haul coal traffic
Trolley wire locomotive haulage
Trolley wire locomotive haulage
Trolley locomotives v. conveyors
Transporting pulverized coal by railway
Transportation service for Mobile loaders
Transportation problem solved with belt conveyors
Transportation power supply costs
Transportation of pipes, long lumber, and rails in Friedrich Heinrich mine
Transportation of material by underground suspension monorail railway
Transportation of coal slurries in pipelines
Transportation at Eunice mines
Transport and distribution of coal; methods in United Kingdom and abroad compared
Track-mounted surge cars speed entry development