Ключевые слова: accuracy, architecture, background, balance, builder, building, constructing line, construction, degree, design, equipment, glass, grade, hammer, home, house, improvement, industrial, industry, instrument, isolated, layer, level, leveler, line, liquid, mark, measure, measurement, measuring, metal, notch, pitch, plane, precision, rate, ruler, scale, spirit, stability, standard, structural, surface, symmetry, tool, tools, white, work, worker, yellow,