[스크랩] TAP 기초 홀차트
TAP DRILL PITCH M1 0.75 0.25 M1.2 0.95 0.25 M1.4 1.10 0.3 M1.7 1.35 0.35 M2 1.60 0.4 M2.3 1.90 0.45 M2.6 2.15 0.45 M3 2.40 0.5 M3.5 2.90 0.6 M4 3.25 0.7 M4.5 3.75 0.75 M5 4.1 0.8 M5.5 4.6 0.9 M6 5.0 1 M7 6.0 1 M8 6.8 1.25 M9 7.8 1.25 M10 8.5 1.5 M12 10.2 1.75 M14 12 2 M16 14 2 M18 15.5 2.5 M20 17.5 2.5 M22 19.5 2.5 M24 21 3 M27 24 3