| |||
| 联机检索系统 | |||
|
on-line retrieval system : 5 phrases in 4 subjects |
| Agriculture | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Telecommunications | 2 |
| |||
| 联机检索系统 | |||
|
on-line retrieval system : 5 phrases in 4 subjects |
| Agriculture | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Telecommunications | 2 |