Ключевые слова: business, connect, connection, construction, day, dug, empty, energy, engineering, equipment, excavate, field, flow, fuel, gas, generation, heap, industrial, industry, iron, lay, line, metal, natural, new, oil, open, opened, outdoor, parts, petrochemical, pile, pipe, pipeline, piping, power, rail, replace, replacement, sky, soil, steel, supply, technology, tube, underground,