 |
| |||
| oil casing and tubing | |||
|
套管和 油 管 : 5 phrases in 3 subjects |
| Geophysics | 1 |
| Mechanics | 3 |
| Metallurgy | 1 |
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