| |||
| 梯形螺纹套管 | |||
| 偏梯形螺纹套管 | |||
| 偏梯形扣套管; 梯形扣套管 | |||
|
buttress thread casing : 9 phrases in 3 subjects |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Technology | 3 |
| |||
| 梯形螺纹套管 | |||
| 偏梯形螺纹套管 | |||
| 偏梯形扣套管; 梯形扣套管 | |||
|
buttress thread casing : 9 phrases in 3 subjects |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Technology | 3 |