Ключевые слова: accuracy, alignment, background, balance, bubble, builder, building, carpenter, center, check, construction, contractor, equality, equipment, flat, glass, home, horizontal, house, industrial, industry, inspection, instrument, isolated, level, leveler, line, liquid, measure, measurement, metal, object, perfect, perfection, precision, quality, renovation, ruler, spirit, surface, symmetry, tool, tube, water, work, worker, yellow,