内测千分尺 721/INSIDE MICROMETERS 721
内径千分尺用于精密零件的内尺寸测量。
The inside micrometers are used for measuring internal dimensions of varions precision workpieces.
| 编 号 Item No. | 测量范围 Measuring range | 读数值 Reading value | 质 量 Weight(kg) |  | 
| 721-01 | 5-30mm | 0.01mm | 0.139 | |
| 721-02 | 25-50mm | 0.142 |