 |
| |||
| 步进式的 | |||
|
step type bit : 52 phrases in 11 subjects |
| Chemistry | 1 |
| Compressors | 1 |
| Computer numerical control | 1 |
| Drilling | 3 |
| Electronics | 2 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 38 |
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