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![Serving robots serve drinks at a 24-hour unmanned smart robot cafe at Korea Metal Week 2020 held at Kintex in Goyang, Gyeonggi, on Wednesday. The exhibition will last until Saturday, showing off a broad range of innovative ideas for industrial applications. [YONHAP]](https://image.koreajoongangdaily.com/11417337.jpg?imageId=11417337&width=240&height=184&format=webp&format=jpg)