| 1. | In some instances, a halo may be seen around the center when held to light .
在某些情况下，一个孔环在光照下面可以看到的是围绕的中心点。 |
| 2. | Lifting appliances ; large - eye hooks ; grade 5
提升设备.大孔环挂钩. 5级 |
| 3. | Specification for holes and shanks for buttons
钮扣孔眼和孔环规范 |
| 4. | Standard tapping ring for wire thread insert
钢丝螺套用标准螺孔环 |
| 5. | Cutter for machining annular groove in inner bore
内孔环槽切刀 |
| 6. | Small diameter smooth plug gauge of standard tapping ring for wire thread insert
钢丝螺套用标准螺孔环小径的光滑塞规 |
| 7. | Minimum annular ring
孔环下限 |
| 8. | Calibration of the standard tapping ring for wire thread insert - go thread plug gauge t - t
钢丝螺套用标准螺孔环的校通?通螺纹塞规t - t |
| 9. | Calibration of the standard tapping ring for wire thread insert - worn thread plug gauge t - s
钢丝螺套用标准螺孔环的校通?损螺纹塞规t - s |
| 10. | Calibration of the standard tapping ring for wire thread insert - no go thread plug gauge t - z
钢丝螺套用标准螺孔环的校通?止螺纹塞规t - z |
