测量范围        L
                                6 - 8mm     45                盲孔测量
                                8 - 10mm    45                测针固定在钳夹上，可直达盲孔底端
                                10 - 12mm   45                测量内径。

                                12 - 16mm   76
                                16 - 20mm   76
                                20 - 25mm   91
                                25 - 30mm    103
                                30 - 40mm    103
                                40 - 50mm    102
                                50 - 63mm    105
                                62 - 75mm    105                       

                                75 - 88mm    105
                                87 - 100mm   105
                                100 - 125mm  151               测量范围        a     b     c
                                125 - 150mm  151               2 - 6mm     —  —  2
                                150 - 175mm  151               6 - 12mm    2     —  2.5
                                175 - 200mm  151               12 - 20mm   0.3   5.6   3.5
                                200 - 225mm  151               20 - 30mm   0.3   8.3   5.2
                                225 - 250mm  151               30 - 50mm   0.3   13    10
                                250 - 275mm  151               50 - 100mm  0.3   17    14
                                275 - 300mm  151               100 - 300mm 12.4  21