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RE: SALt - Sustainable and cost effective ecologically designed lantern

in #steemhunt • 7 years ago

저도 확실히 원리는 모르겠지만 전지의 원리를 이용하는 것 같네요.
양초를 쓰는 대신 쓰면 유용하겠네요.

7 years ago in #steemhunt by
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