| |||
钻头离开井底; 未接触井底; 井底之上 | |||
| |||
钻头离开井底 | |||
离开炉底全部熔化 | |||
近离孔底; 全部溶化 |
off bottom : 27 phrases in 7 subjects |
Drilling | 8 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
Labor organization | 1 |
Oil / petroleum | 11 |
Project management | 1 |
Technology | 4 |