Synonyme wurden verwendet für:
Coal mines and mining
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keywords:("Coal mines and mining")
Mobile laboratory of east midlands division
Analysis of performance of some sections of underground transportation
Trolley locomotives v. conveyors
Battery power for shuttle cars
Shuttle cars -- Room-and-pillar retreat mining in thin seam
Safety problems in connection with operation of rubber-tired shuttle cars
Derailments on main and tail haulages, and on direct rope haulage
Falls in bord-and-pillar whole workings
Eris-Mecanaub monorail with axial traction
Electronically controlled braking and transportation devices in mine car circulation
Underground aerial cableway for transportation of passengers
Underground railroading at Mathies
Shuttle-car accidents in thick seams
Solid tires on shuttle cars cut operating costs
Automatic rope haulage clip for mine cars