Ключевые слова: abstract, agriculture, apparatus, backward, bright, broadcasting, cable, cement, china, closeup, cloudy, communication, concepts, concrete, country, detail, energy, environment, equipment, facilities, history, industry, landscape, line, loudspeaker, materials, messy, nostalgia, object, outdoor, power, retro, rural, simple, sky, speaker, transmission, transport, voltage, wide angle, wire rod,