https://doi.org/10.1351/goldbook.09951
Unique type of planetary motion (so named because the flow tubes form a letter J figure, as shown in the figure in high-speed counter-current chromatography) of the column holder, which rotates around its own axis once during one revolution around the central axis of the centrifuge in the same direction.
Note: The system prevents the flow tubes from twisting during column rotation, and produces an excellent mixing and high retention of the stationary phase in a multilayer coil separation column.