The invention is applicable to traffic indicator board, large information display board and ring shaped movie theater etc.
可应用于交通指示牌、大型场合信息显示板及环形电影院等方面。
The invention is applicable to traffic indicator board, large information display board and ring shaped movie theater etc.
可应用于交通指示牌、大型场合信息显示板及环形电影院等方面。
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