 |
| |||
| 钻头齿与井底接触面积; 钻头在井底覆盖面积 | |||
| 钻头牙齿与井底接触面积 | |||
| 井眼环形空间 | |||
|
hole coverage : 9 phrases, 3 sujets |
| Forage | 4 |
| Pétrole / pétrole | 4 |
| Technologie | 1 |
|
| |||
| 钻头齿与井底接触面积; 钻头在井底覆盖面积 | |||
| 钻头牙齿与井底接触面积 | |||
| 井眼环形空间 | |||
|
hole coverage : 9 phrases, 3 sujets |
| Forage | 4 |
| Pétrole / pétrole | 4 |
| Technologie | 1 |