 |
| |||
| design constant | |||
| 计算 常 数: 8 phrases in 7 subjects |
| Drilling | 1 |
| Economy | 1 |
| General | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |
| Textile industry | 1 |
| United Nations | 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