[問題] 有人知道這裝置的作用是什麼?
朋友傳來的圖片,看了好久不明白這裝置是幹麻用的?
有人知道嗎?謝謝
http://i.imgur.com/FP7csSS.jpg
![](https://i.imgur.com/FP7csSS.jpg)
![](https://i.imgur.com/JcYEwW0.jpg)
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