 |
| |||
| dutch oven furnace; extension furnace | |||
| external firing system | |||
| furnace extension | |||
| Dutch-oven furnace; external furnace | |||
| выносная топка: 9 phrases in 6 subjects |
| Cement | 1 |
| Energy industry | 2 |
| Gas processing plants | 1 |
| General | 2 |
| Technology | 2 |
| Thermal engineering | 1 |