| |||
| 切削型钻头 | |||
|
bit drag : 38 phrases in 8 subjects |
| Construction | 1 |
| Drilling | 3 |
| Engineering geology | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Mechanics | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 6 |
| Technology | 21 |
| |||
| 切削型钻头 | |||
|
bit drag : 38 phrases in 8 subjects |
| Construction | 1 |
| Drilling | 3 |
| Engineering geology | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Mechanics | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 6 |
| Technology | 21 |