The present invention provides a rubber composition which when vulcanized may be used to form a safety support intended to be mounted on a wheel rim within a tire. A method of manufacturing the heat exchanger is also presented as well as a heat ventilation air conditioning system in which the heat exchanger may be employed. Given the architecture of the data packet switch and its control algorithm, dynamic memory buffers neither need to be refreshed nor their contents have to be restored after reading. Thereby, non-stale translations remain cached but stale translations are discarded. A handle is used to rotate the camshaft.