 |
| thawing-and-freezing test: 9 phrases in 5 subjects |
| Construction | 2 |
| Firefighting and fire-control systems | 1 |
| Mining | 1 |
| Refrigeration | 1 |
| Silicate industry | 4 |
|
| thawing-and-freezing test: 9 phrases in 5 subjects |
| Construction | 2 |
| Firefighting and fire-control systems | 1 |
| Mining | 1 |
| Refrigeration | 1 |
| Silicate industry | 4 |