 |
| |||
| ★ locking system | |||
|
锁闭系统 : 20 phrases in 8 subjects |
| Automobiles | 1 |
| Electric machinery | 1 |
| Electronics | 4 |
| Metallurgy | 2 |
| Plastics | 1 |
| Power electronics | 1 |
| Sports | 1 |
| Technology | 9 |
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