 |
| |||
| 记录用阴极射线管 (tube) | |||
| electron-recording: 12 phrases in 7 subjects |
| Earth sciences | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Space | 3 |
| Technology | 3 |
|
| |||
| 记录用阴极射线管 (tube) | |||
| electron-recording: 12 phrases in 7 subjects |
| Earth sciences | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Space | 3 |
| Technology | 3 |