A process is provided for removing polymer from a backside of a workpiece andor photoresist from a front side of the workpiece. The air deflection elements are displaceable, preferably in unison, between a retracted position and at least one deployed position, and may be deployed and retracted manually, or remotely with powered assistance, or under microprocessor control. Said supporting member has a number of lateral slots for receiving lips of a supporting plate being pivotally connected to said back rest and in that case engaging said back rest. Force is applied to the second clutch disk by the spring alongside the axis in the direction toward the first clutch disk. The leads are surrounding the heat dissipation pad. A method for mobile station operations includes transmitting a first message, receiving a second message responsive to the first message, and initiating a handover with the target controller and a serving controller.