A supporting device for a plurality of adapter chucks for the precision grinding or polishing of optical components comprises a spindle shaft having a central bore for supplying one of a gas and a vacuum, at least one arm adjustably supported by a head of the spindle shaft and having a seating for an adapter chuck, and a flexible vacuumgas line provided between the seating and the spindle shaft. The delivery of the entity-related information is triggered by the validation of a service ticket received by the authentication component of the RESTful service. Two side walls are disposed in the salt container, the dividing walls extending from the side walls to the bottom, dividing the salt container into a water distribution duct including the water inlet, a salt chamber, and a brine collecting duct including the brine outlet. Thus an adaptive NDR element can be utilized advantageously within a conventional semiconductor circuit.