The locking device contains a latch element and an elastic element. The throttle can be disc or cone shaped or shaped to generally fill the volume between the closed throttle and the inlet valve seat. The system also includes a token scheduling controller, wherein the token scheduling controller is adapted to process instructions corresponding to the user inputs and sending token scheduling instructions corresponding to the user-defined parameters to the business process simulation. The car navigation system retrieves and downloads desired music data from the music data storage of the server through interaction with the server in accordance with the speech-based interactive document received from the server. Regions of exposed silicon may then be etched with more reproducible etch rates from wafer-to-wafer.