Observerare

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  Kory Cowen

  https://bitcoin-review.net/%EB%B2%A0%EC%8A%A4%ED%8A%B8-%ED%86%A0%ED%86%A0%EC%82%AC%EC%9D%B4%ED%8A%B8%EC%9D%98-%EB%AA%A8%EB%93%A0-%EA%B2%83-%EC%95%88%EC%A0%84%ED%95%98%EA%B3%A0-%EC%8B%A0%EB%A2%B0%ED%95%A0-%EC%88%98-%EC%9E%88/