Ключевые слова: backgrounds, blue, business, cable, car, circle, closeup, color image, connection, curve, day, electricity, environment, environmental conservation, equipment, garden hose, grass, green color, hose, industry, irrigation equipment, machine valve, machinery, macro, metal, nature, outdoors, part of, pipe tube, pipeline, plastic, pollution, power, protection, rubber, science, single object, spiral, steel, summer, technology, tire, transportation, tube, tubing, vacuum clenaer, water, wheel, white,