Ключевые слова: background, ball, bathroom, blue, boiler, construction, control, equipment, faucet, flowing, gate, handle, house, industrial, industry, knob, maintenance, manufacturing, materials, off, open, pipe, pipeline, plastic, plumber, plumbing, pressure, pvc, red, service, smooth, supply, technology, thread, tool, tube, tubing, valve, valves, water, white,