Speaker
Dr
Eckehard Büscher
(IGO - International Coordination Office of German Geothermics)
Description
In replacement of V. WITTIG, whose contribution is "Down the hole hammer drilling technologies: status and future development".
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E. BUSCHER
![E. BUSCHER FOR V. WITTIG][12]
[12]: https://indico.cern.ch/event/263557/picture/46.jpg