Biaxial pressure sensor
Bore hole rock shear tester and method for using same
Borehole "creep" displacement tool
Borehole dilatometer intensifier
Borehole dilatometer with intensifier
Borehole directional dilatometer
Borehole extensometer for monitoring relative mass displacements
Borehole gauge for in-situ measurement of stress and other physi
Borehole strain monitor for soft rock
Borehole stress-meter and method and apparatus for the installat