Keywords:
Additional devices, Belt conveyors, Brown coal mines, Bucket wheel excavator, Bucket-ladder dredge, Coal mining, Commissioning, Constructions, Driver's cabs, Engines, Ergonomic design, Ergonomics, Excavators, Ladders, Large scale equipment, Lignite, Locking devices, Mechanical engineering, Mining, Mining equipment, Operators, Operators (personnel), Protection devices, Quarrying, Safety devices, Safety engineering, Safety requirements, Shovel conveyor, Specification (approval), Spreaders, Steps, Surveillance (approval), Test time-limits, Testing