In various embodiments, the gaming system and method disclosed herein maintains a progressive award that is associated with a plurality of different progressive award trigger values or progressive award hit values. A communication system includes a certificate authority for performing authentication, a roadside device, a vehicle-mounted terminal, a first server, and a second server. According to the invention, for generating the pressure pulses a plurality of small, quick-acting valves are in each case briefly opened, the opening moments being adapted to one another in such a way that partial pulses released thereby arrive simultaneously at the inlet of a flushing line common thereto. The insulating layer is dimensioned and configured to have different coefficients of heat transfer. Coherent detection may also enable or improve the performance of other channel techniques such as Partial response maximum likelihood, the various classes of extended PRML, and of Noise predictive maximum likelihood detection. An abrasive coating, which has an effective length corresponding to the section thickness along the section depth, is applied to the blade tip, the abrasive coating of the blade tip brushing against an abrasion coating, which is introduced into the surrounding housing.