Ключевые слова: architecture, background, big, blue, clean, construction, dam, design, ecology, energy, environment, factory, filter, flow, icon, illustration, industrial, industry, isolated, lake, landscape, liquid, natural, nature, pipe, plant, pool, power, purification, purity, recycling, reflection, reservoir, river, sewage, sky, station, steel, storage, store, stream, supply, system, tank, thailand, treatment, view, water, white,