(57) A device for performing soil inspection by means of a tube to be driven into the
soil, comprising driving means which grip around the tube substantially coaxially
said driving means comprising either a cylinder with a hollow piston rod or pairs
of opposed driving wheels. Auxiliary means are provided for facilitating soil inspection
operations with such a device, such as an improved pressing and pulling head, and
means for signal transfer from a measuring cone towards measuring instruments at the
soil surface.
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