PCB 常用的 mil-mm 对照表 mil 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 mm mil 0.0254 21 0.0508 22 0.0762 23 0.1016 24 0.1270 25 0.1524 26 0.1778 27 0.2032 28 0.2286 29 0.2540 30 0.2794 31 0.3048 32 0.3302 33 0.3556 34 0.3810 35 0.4064 36 0.4318 37 0.4572 38 0.4826 39 0.5080 40 mm mil mm mil 0.5334 41 1.0414 0.5588 42 1.0668 0.5842 43 1.0922 0.6096 44 1.1176 0.6350 45 1.1430 0.6604 46 1.1684 0.6858 47 1.1938 0.7112 48 1.2192 0.7366 49 1.2446 0.7620 50 1.2700 0.7874 51 1.2954 0.8128 52 1.3208 0.8382 53 1.3462 0.8636 54 1.3716 0.8890 55 1.3970 0.9144 56 1.4224 0.9398 57 1.4478 0.9652 58 1.4732 0.9906 59 1.4986 1.0160 60 1.5240 mm mil 61 1.5494 62 1.5748 63 1.6002 64 1.6256 65 1.6510 66 1.6764 67 1.7018 68 1.7272 69 1.7526 70 1.7780 71 1.8034 72 1.8288 73 1.8542 74 1.8796 75 1.9050 76 1.9304 77 1.9558 78 1.9812 79 2.0066 80 2.0320 mm 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 2.0574 2.0828 2.1082 2.1336 2.1590 2.1844 2.2098 2.2352 2.2606 2.2860 2.3114 2.3368 2.3622 2.3876 2.4130 2.4384 2.4638 2.4892 2.5146 2.5400