| |||
| 研究、设计和开发 | |||
|
research, engineering and development : 23 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Business | 1 |
| Earth sciences | 4 |
| Electronics | 4 |
| General | 3 |
| Leather | 1 |
| Space | 3 |
| United States | 1 |
| |||
| 研究、设计和开发 | |||
|
research, engineering and development : 23 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Business | 1 |
| Earth sciences | 4 |
| Electronics | 4 |
| General | 3 |
| Leather | 1 |
| Space | 3 |
| United States | 1 |