 |
| |||
| dust collection by exhaust ventilation; dust extraction by exhaust ventilation; dust extraction by suction | |||
| aspiración de polvos: 3 phrases in 3 subjects |
| Coal | 1 |
| General | 1 |
| Industry | 1 |
|
| |||
| dust collection by exhaust ventilation; dust extraction by exhaust ventilation; dust extraction by suction | |||
| aspiración de polvos: 3 phrases in 3 subjects |
| Coal | 1 |
| General | 1 |
| Industry | 1 |