[問卦] 有人看過電風扇擺頭角度為何不一樣

如題
我們在吹電風扇時
如果讓風扇襬頭
有幾隻風扇
可能就會一邊比較淺 一邊比較深
如圖
https://i.imgur.com/NejdCiq.jpg

為什麼啊
不能左邊右邊的襬頭深度都一樣嗎

有眯掛

嘶嘶

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謝謝 我來看看他的擺動機制是