LED at 50: An illuminating history by the light's inventor(bbc.co.uk)2 ポイント·投稿者 pmjordan·14 年前·0 コメントbbc.co.ukLED at 50: An illuminating history by the light's inventorhttp://www.bbc.co.uk/news/technology-198865340 コメントコメントを投稿—