 |
| |||
| optical recorder | |||
| 光记录仪: 48 phrases in 14 subjects |
| Agriculture | 1 |
| Aviation | 6 |
| Earth sciences | 3 |
| Electronics | 7 |
| General | 1 |
| Geology | 3 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Missiles | 1 |
| Shipbuilding | 2 |
| Space | 5 |
| Technology | 14 |
| Telecommunications | 2 |
|
| |||
| optical recorder | |||
| 光记录仪: 48 phrases in 14 subjects |
| Agriculture | 1 |
| Aviation | 6 |
| Earth sciences | 3 |
| Electronics | 7 |
| General | 1 |
| Geology | 3 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Missiles | 1 |
| Shipbuilding | 2 |
| Space | 5 |
| Technology | 14 |
| Telecommunications | 2 |