 |
| |||
| 锅炉炉管 | |||
| generator tube: 23 phrases in 7 subjects |
| Air defense | 1 |
| Chemistry | 1 |
| Electronics | 6 |
| Mechanics | 1 |
| Metallurgy | 4 |
| Technology | 9 |
| Water resources | 1 |
|
| |||
| 锅炉炉管 | |||
| generator tube: 23 phrases in 7 subjects |
| Air defense | 1 |
| Chemistry | 1 |
| Electronics | 6 |
| Mechanics | 1 |
| Metallurgy | 4 |
| Technology | 9 |
| Water resources | 1 |