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Geomechanik Wasser-Und Umwelttechnik GmbH
| Geomechanik Wasser-Und Umwelttechnik GmbH Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20090101413 | DTH-hammer drilling device and overburden drilling method - The invention relates to a DTH-hammer drilling device, comprising a down-the-hole- (DTH-) hammer ( | 04-23-2009 |