Ключевые слова: aged, background, box, building, building exterior, built structure, cellar, condominium, construction, dirty, door, energy, europe, exterior, fossil fuel, fuel and power generation, gas, gas meter, gaz, house, industrial, industry, italy, metal, meter, methane, natural gas, old, outdoors, pipe, plaster, power, propane, protection, protective, rusty, safety, steel, technology, wall,