(学来的呵):长的圣诞灯线可能会有两个或更多串联电路在一起的。所以

来源: 2023-12-02 10:46:37 [博客] [旧帖] [给我悄悄话] 本文已被阅读:

https://www.popularmechanics.com/home/a3231/how-to-fix-christmas-lights/

https://www.usatoday.com/story/money/columnist/2020/12/10/broken-christmas-lights-how-to-fix-bulbs-and-strands-dont-light/3885086001/