Ключевые слова: aqueduct, cable, conduit, connect, construction, crane, dig, ditch, duct, earth, energy, engineering, equipment, excavation, excavator, gas, gasmain, heating, industrial, industry, infrastructure, installation, laying, line, main, petroleum, pipe, pipelaying, pipeline, pipelining, piping, plastic, power, purveyance, repair, soil, straight, technology, tractor, transmission, transport, transportation, trench, trunk, tube, tubing, water, welding, work, worker,