RE: 세계최초 블록체인 600년전 조선에서 도입 되었다.

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세계최초 블록체인 600년전 조선에서 도입 되었다.

in kr •  7 years ago 

우리것인데 좋게 생각하면 좋죠 뭐 ㅎㅎ 감사합니다.

kr
7 years ago by

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