Shelby tube
a sampling device that is pushed ahead of the drill bit.
Source John M. Sharp, Jr. 2007 Department of Geological Sciences Jackson School of Geosciences The University of Texas Austin, Texas, USAЗураг
a sampling device that is pushed ahead of the drill bit.
Source John M. Sharp, Jr. 2007 Department of Geological Sciences Jackson School of Geosciences The University of Texas Austin, Texas, USA