https://financialist.tistory.com/entry/KIKO-%EB%B0%8F-%EC%84%A0%EB%AC%BC%ED%99%98-%EC%86%90%EC%9D%B5%EB%B6%84%EC%84%9D-%EB%B0%8F-%EC%82%AC%ED%9B%84%EA%B4%80%EB%A6%AC-SHEET
https://www.exparo.com/kr/mx/simulate.action
https://patents.google.com/patent/KR101026250B1/ko
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