Ключевые слова: adjusting, antique, architecture, background, balance, bob, builder, check, construction, cord, craft, craftsman, efficiency, engineering, equipment, gravity, hanging, heavy, instrument, isolated, labor, layer, level, line, masonry, measure, measurement, nostalgic, object, old, outside, perpendicularly, plumb, plumbing, plummet, precise, precision, rope, site, steel, straight, string, tool, tools, vertical, vintage, weight, work tool, worker, working,