 |
| |||
| countercurrent circulation; counterflush; indirect flushing; reverse circulation; reversed circulation of mud | |||
| Verkehrtspülung: 4 phrases in 2 subjects |
| Metallurgy | 1 |
| Mining | 3 |
|
| |||
| countercurrent circulation; counterflush; indirect flushing; reverse circulation; reversed circulation of mud | |||
| Verkehrtspülung: 4 phrases in 2 subjects |
| Metallurgy | 1 |
| Mining | 3 |