范围(mm) 精度mm)   测量深度(mm) 环规(mm)

2-2.5     0.004      12         2.5
2.5-3     0.004      12         2.5
3-4       0.004      12         4
4-5       0.004      20         4
5-6       0.004      20         5
6-8       0.004      58         8
8-10      0.004      58         8
10-12.5   0.004      58        12.5
12.5-16   0.004      62        12.5
16-20     0.004      62         20
20-25     0.004      66         20
25-35     0.004      66         35
35-50     0.004      80         35
50-65     0.005      80         65.0
65-80     0.005      80         65.0
80-100    0.005      85         80.0
100-125   0.005      100         125
125-150   0.005      100         125
150-175   0.005      100         175
175-200   0.005      100         175
200-225   0.007      105         212.5
225-250   0.007      105         237.5
250-275   0.007      105         262.5
275-300   0.007      105         287.5 

内径千分尺