 |
| |||
| two pinned arch | |||
| two-hinged arch | |||
|
双較拱 : 4 phrases in 2 subjects |
| Architecture | 2 |
| Electronics | 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