Ключевые слова: adjusting, art, boiler, branching, broken, color, colorful, container, contour, crack, engineering, equipment, gas, glove, handle, hot, house, icon, illustration, industrial, industry, isolated, line, linear, liquid, maintenance, man, outline, pail, pipeline, plumbing, pop, popart, pressure, rain, repair, search, service, set, technology, temperature, tool, valve, water, work, worker, wrench,