 |
| |||
| 轴套管; 轴凸缘 | |||
| 轴肩挡圈 | |||
| 井口; 井圈 | |||
| 固定盘为保证凿井作业安全和进行井筒测量等作业，在封口盘下方一定距离设置的,固定于井壁的盘状结构物 | |||
| 轴颈; 轴环; 井筒锁口盘; 凸缘 | |||
| shaft collar: 4 phrases in 3 subjects |
| Computer numerical control | 1 |
| Hydroelectric power stations | 2 |
| Technology | 1 |
|
| |||
| 轴套管; 轴凸缘 | |||
| 轴肩挡圈 | |||
| 井口; 井圈 | |||
| 固定盘为保证凿井作业安全和进行井筒测量等作业，在封口盘下方一定距离设置的,固定于井壁的盘状结构物 | |||
| 轴颈; 轴环; 井筒锁口盘; 凸缘 | |||
| shaft collar: 4 phrases in 3 subjects |
| Computer numerical control | 1 |
| Hydroelectric power stations | 2 |
| Technology | 1 |