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I used sound waves to make espresso. It could cut coffee‑brewing energy use by ¾

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Hacker News · zeristor · 2026-06-13 커뮤니티

▲ 11 points · 💬 0 comments · Hacker News

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출처: theconversation.com · https://theconversation.com/i-used-sound-waves-to-make-espresso-it-could-cut-coffee-brewing-energy-use-by-75-284929

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