Of the large theater, large singing performance, carnival, football game and open-air concert can see the effect of this kind of machine.
现今，在欧洲、美洲等国家都选用这种能达到最好效果的彩虹机。
Of the large theater, large singing performance, carnival, football game and open-air concert can see the effect of this kind of machine.
现今，在欧洲、美洲等国家都选用这种能达到最好效果的彩虹机。
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