Ключевые слова: bolt, chemical, chemistry, closed, connection, connector, construction, control, crane, distribution, energy, engineering, equipment, factory, flow, flowing, fossil, fuel, gas, gasoline, industrial, industry, iron, line, metal, methane, natural, oil, physical, pipe, pipeline, power, pressure, production, pump, reservoir, rig, screw, steel, supply, system, tap, technology, transmission, transport, transportation, tube, tubing, valve, yellow,