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                    LED 是英文 light emitting diode (發光二極战意管)的縮寫,它的基本結構是一塊電致發光的半導體材料,置於一個有引線的架子上,然後四周用環氧樹脂密封,起到保護內部芯線→的作用,所以 LED 的抗震性能好。
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