 |
| |||
| 螺纹件凹端 | |||
| 杯形端 | |||
|
cup point : 25 phrases in 8 subjects |
| Chemistry | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Plastics | 1 |
| Space | 4 |
| Technology | 14 |
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