ALWAG TUNNELAUSBAU GESELLSCHAFT M.B.H.
|ALWAG TUNNELAUSBAU GESELLSCHAFT M.B.H. Patent applications|
|Patent application number||Title||Published|
|20090114402||Method and Device for Drilling, Particularly Percussion or Rotary Percussion Drilling ,a Hole in Soil or Rock Material - The invention relates to a method and device for drilling, particularly percussion drilling or rotary percussion drilling a hole in soil or rock material and fixing an anchoring in the hole. To this end, a drilled hole is made by a drill bit (||05-07-2009|