Ключевые слова: backhoe, boulders, burly, caterpillar, coil, construction, dark, determination, diorama, drill, effort, endurance, engine, engineering, equipment, excavator, gear, grooves, heavy duty, humanlabor, illuminated, imposing, industrial, loader, luminescent, machine, machinery, meticulous, mineshaft, mining, modern, occupational, operational, plumb, powerful, progress, rocky, subterranean, suddenly, tunnel, underground, uvlight, vigorous, workplace,