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The public broadcast system is provides thebroadcast and the fire linkage warning intelligent specialized equipment background music, the specially for the public place.Widespread applies in the guesthouse,the restaurant, the large-scale conference site, the commercial building,the factory, the garden plot, the school, the military compound, the supermarket, fast-food places and so on shop, cafe, station, wharf, traveling scenic spot, theater, stadium, parking lot, square, administration building. Since 1998, Guangzhou Wan Shengda has produced the WTOPA public broadcast...