removable blade - Richmond group
- resistivity sonde
- resistivity sondes with deep and medium depth of investigation
- resistivity stratification
- resistivity structure
- resistivity survey
- resistivity technique
- resistivity tool
- resistivity variation
- resistivity works
- resoil
- resoiling
- resoilled
- resoilling
- resolution
- resolution criterion
- resolve
- resolved echo
- resolvent
- resonance
- resonance peak