 |
| |||
| upcast ventilation shaft airflow (soa.iya) | |||
| return air; return current; upcast air | |||
| air return; return | |||
| исходящая вентиляционная струя: 9 phrases in 2 subjects |
| Mining | 5 |
| Technology | 4 |
|
| |||
| upcast ventilation shaft airflow (soa.iya) | |||
| return air; return current; upcast air | |||
| air return; return | |||
| исходящая вентиляционная струя: 9 phrases in 2 subjects |
| Mining | 5 |
| Technology | 4 |