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led
- LED 它的基本结构是一块电致发光的半导体材料,置于一个有引线的架子上,然后四周用环氧树脂密封,起到保护内部芯线的作用,所以 LED 的抗震性能好。 -The basic structure of the LED it is an electric semiconductor materials, placed on a wire rack, four weeks and then sealed with epoxy resin, played the role to protect the