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| cementing the casing | |||
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固套管 : 32 phrases in 10 subjects |
| Compressors | 1 |
| Computer numerical control | 1 |
| Drilling | 10 |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Metallurgy | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 7 |
| Technology | 7 |
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