Ключевые слова: cavern, coal, construction, dim, dirt, dump, earth, engineering, environment, equipment, excavation, extraction, ground, haul, haulage, heavy, industry, infrastructure, landscape, large, light, load, machinery, mechanical, metallic, mine, mineral, minerals, mining, moving, operator, ore, quarry, removal, resources, rocks, rugged, safety, site, stone, surface, terrain, transport, transportation, truck, tunnel, underground, waste, work, workers, yellow,