Ключевые слова: abstract, blue, construction, control, curve, design, engineering, equipment, faucet, finger, fuel, gas, glove, gold, golden, hand, icon, illustration, industrial, industry, isolated, latex, line, long, metal, ocean, oil, pipe, pipeline, plumbing, pressure, protection, protective, rubber, safety, sea, set, shadow, steel, symbol, system, technology, tube, valve, water, wave, work,