Ключевые слова: boil, boiler, bridge, burn, business, commerce, commercial, convert, converting, electrical, electricity, environment, gas, gasoline, generating, generation, generator, heat, hongkong, hot, huge, immense, industrial, industry, iron, ladder, lines, massive, oil, pipe, pipelines, piping, plumbing, pollution, power, powerful, robots, sky, smokestack, steam, steel, steps, stonecutters bridge, technical, technological, toxic, transformation, transportation, turbine, walkway,