 |
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| 钻头牙齿与井底接触面积 | |||
| 井眼环形空间 | |||
| 钻头齿与井底接触面积; 钻头在井底覆盖面积 | |||
|
hole coverage : 9 do fraz, 3 tematyki |
| Ropa / ropa naftowa | 4 |
| Technika i technologia | 1 |
| Wiercenie | 4 |
|
| |||
| 钻头牙齿与井底接触面积 | |||
| 井眼环形空间 | |||
| 钻头齿与井底接触面积; 钻头在井底覆盖面积 | |||
|
hole coverage : 9 do fraz, 3 tematyki |
| Ropa / ropa naftowa | 4 |
| Technika i technologia | 1 |
| Wiercenie | 4 |