Ключевые слова: above, aboveground, bolt, commercial, conduit, connected, connection, control, controlling, controls, flow, gas, gasoline, ground, handle, industry, infrastructure, iron, isolated, liquid, liquids, natural, oil, petrol, petroleum, pipeline, pipes, pump, pumped, pumps, regulate, regulates, regulating, remote, resource, resources, sewage, sewer, switch, switches, transport, transporting, turn, turning, turns, under, underground, valve, valves, water,