Ключевые слова: abstract, background, concept, conduit, connection, construction, control, crane, ecological, ecology, element, energy, engineering, environment, equipment, factory, faucet, fitting, gas, gasoline, gear, illustration, industrial, industry, mechanism, metal, oil, pattern, petroleum, pipe, pipeline, piping, plant, pollution, power, pressure, protect, protection, pump, refinery, seamless, system, tap, technology, tube, valve, water, white, work,