 |
| |||
| 防火手册 | |||
| fire manual: 13 phrases in 6 subjects |
| Architecture | 1 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Navigation | 1 |
| Rail transport | 1 |
| Technology | 8 |
|
| |||
| 防火手册 | |||
| fire manual: 13 phrases in 6 subjects |
| Architecture | 1 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Navigation | 1 |
| Rail transport | 1 |
| Technology | 8 |