Ключевые слова: 3d, abstract, big, black, blue, chemical, connection, customs, electricity, energy, engineering, equipment, facility, factory, fitting, fuel, gas, gasoline, gate, heavy, illustration, industrial, industry, isolated, line, oil, outline, pairs, pipe, pipe line, pipeline, piping, plant, plumbing, power, pressure, resources, stainless, steel, tap, technology, transparent, tube, tubing, valve, water, wire, wire frame, wireframe,