| |||
| 偏梯形套管螺纹; 套管偏梯形螺纹 | |||
|
buttress casing thread : 12 phrases in 4 subjects |
| Mechanics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Technology | 5 |
| |||
| 偏梯形套管螺纹; 套管偏梯形螺纹 | |||
|
buttress casing thread : 12 phrases in 4 subjects |
| Mechanics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Technology | 5 |