A data processing system which allows a client to request or release multiple computing resources with a single action. A planetary gear mount is secured between the trailing members at upper and lower attachments that are spaced from the chassis ends of the trailing members; and a spring attachment protrudes from the planetary gear mount. Whereby, the pressurized pulse selectively increases the separation of a component pair that exhibits separation at the exit of the first column, but otherwise co-elutes from the column ensemble. The probing stage supports the substrate of the object to be tested from the bottom surface, and controls the temperature of the object to be tested.