 |
| |||
| extension barrel; extension pipe; extension tube | |||
| 加长管: 16 phrases in 6 subjects |
| Automobiles | 2 |
| Engineering geology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 4 |
| Shooting sport | 1 |
| Technology | 7 |
|
| |||
| extension barrel; extension pipe; extension tube | |||
| 加长管: 16 phrases in 6 subjects |
| Automobiles | 2 |
| Engineering geology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 4 |
| Shooting sport | 1 |
| Technology | 7 |