 |
| |||
| 中空圆坯; 空心圆坯 | |||
|
hollow round : 10 phrases in 3 subjects |
| Bridge construction | 1 |
| Metallurgy | 7 |
| Technology | 2 |
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