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The reason most electrical plug prongs have holes in them
来源: Engadget - Technology News & Expert Reviews · 发布于
If you've ever looked at the end of a plug, you've probably wondered why some have holes, and some don't - and no, it's not actually a big conspiracy theory.
If you've ever looked at the end of a plug, you've probably wondered why some have holes, and some don't - and no, it's not actually a big conspiracy theory.
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