Ключевые слова: abstraction, bit, black, borer, boring, bowels, cavern, chisel, closeup, coal, coalcutter, coalmine, cone, crushing, dark, defocused, detail, digger, drilling, equipment, formation, geology, grinding, hard, heavy, hole, huge, industry, instrument, iron, job, machine laver, macro, metal, mine, mineral, mining, mountain, new, profession, resources, rock, roller, sinker, steel, subsurface, teeth, tool, tunnel, turning, underground, work,