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文简要地介绍了已试制成的２２０伏２５瓦－１５瓦的双丝灯泡的结构、性能、用途和制造 工艺上的一些问题，并提出改进的方向。
This paper briefly introduces the structure, properties, application and manufacturing process of some 220 V 25 watt-15 watt double-filament bulbs that have been tried and tested, and points out the direction of improvement.