Customer: RTI (Resonance Technology International).
Used for environmental sampling & based on the Resonant Driver, the RRD110 (later re-labelled as the RRD150), was the first machine designed with rotation. The very challenging task required rotation of the drill string as it was subjected to high-force axial vibration.
For more detail, please refer to the RTI website: http://www.resonancetechnology.ca/home.php