 |
| |||
| 自动调节系统 | |||
| automatic regulating system: 6 phrases in 4 subjects |
| Communications | 1 |
| Electric machinery | 1 |
| Nautical | 3 |
| Rail transport | 1 |
|
| |||
| 自动调节系统 | |||
| automatic regulating system: 6 phrases in 4 subjects |
| Communications | 1 |
| Electric machinery | 1 |
| Nautical | 3 |
| Rail transport | 1 |