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Lighting
other than cinema
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市面上现有一种无极汞灯,可以瞬时开关
Now there is a kind of electrodeless mercury lamp which can be instantaneously switch on and off
投影灯可以在黑暗房间的墙壁或天花板上投射出图片,因此深受孩子们的欢迎
The projection lamps, which could create images on the walls and ceilings of a dark room, are very popular among children
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