 |
| |||
| straight arch | |||
|
直拱 : 16 phrases in 6 subjects |
| Architecture | 2 |
| Construction | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Project management | 1 |
| Technology | 10 |
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