Ключевые слова: activity, angle, architecture, blade, block, brick, builder, cement, circle, circular, concrete, construction, cut, cutting, diamond, disc, dust, electric, equipment, factory, granite, grinder, hand, hard, industrial, industry, job, machine, machinery, man, manufacturing, material, mineral, power, powerful, production, rock, rotation, saw, sawing, sharp, steel, stone, surface, technical, tile, tool, wheel, work, worker,