 |
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| 〔钻杆套管〕外加厚 | |||
| 外加厚管子 | |||
| 外加厚 | |||
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| 外加厚的 | |||
| 外加厚 | |||
| external- upset: 36 phrases in 7 subjects |
| Drilling | 8 |
| Earth sciences | 3 |
| Mechanics | 2 |
| Metallurgy | 3 |
| Mining | 4 |
| Oil / petroleum | 10 |
| Technology | 6 |
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