 |
| |||
| 偏梯形套管螺纹; 套管偏梯形螺纹 | |||
|
buttress casing thread : 12 do fraz, 4 tematyki |
| Hutnictwo | 3 |
| Mechanika | 1 |
| Ropa / ropa naftowa | 3 |
| Technika i technologia | 5 |
|
| |||
| 偏梯形套管螺纹; 套管偏梯形螺纹 | |||
|
buttress casing thread : 12 do fraz, 4 tematyki |
| Hutnictwo | 3 |
| Mechanika | 1 |
| Ropa / ropa naftowa | 3 |
| Technika i technologia | 5 |