 |
| |||
| 中心孔; 顶尖孔 | |||
| 中心炮孔; 中心钻孔 | |||
| 凿孔纸带的中导孔 | |||
| center hole: 34 phrases in 11 subjects |
| Automobiles | 4 |
| Compressors | 1 |
| Drilling | 1 |
| Electric machinery | 5 |
| Electronics | 2 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 4 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Technology | 12 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips