GD&T의 시작은 FCF이다.
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  1단계 - 통제대상 : 피쳐
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  2단계 - 통제목표 : 공차종류
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  3단계 - 통제정도 : 공차영역
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  4단계 - 통제기준1 : 데이텀
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  4단계 - 통제기준2 : DRF
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days after you enroll