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为什么风扇的叶片是奇数，3片或5片或7片？
为什么风扇的叶片是奇数，3片或5片或7片？
奇闻趣事合集102/131
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App02:13打开App观看
![长子县气象台解除大雾黄色预警[Ⅲ级/较重]](http://p26-sign.bdxiguaimg.com/tos-cn-p-0015/oA3yeFB9DDnINUA7HgV2AMvREfozxSAEVTIFxB~tplv-pk90l89vgd-fglass:864:486:90.jpeg?appId=32&channelId=0&customType=custom%2Fnone&from=101_middle_image&imageType=list&isImmersiveScene=0&is_stream=0&lk3s=9d3f5bff&logId=2024111713541892D1B8E028EA43C25AFB&requestFrom=101&x-expires=1763358858&x-signature=T40jWmEouXuKl4CxR4R6PyoD980%3D)
