Computerized clientserver prepress using a downloadable document authoring program. Coupling conduits provide communication between the combustors. The power supply device preferably further includes a power transmission section for receiving the power from the power source section and contactlessly performing power transmission to the vehicle. The user stations receive the transmitted bill availability information and are operable to transmit second requests for bills via the network. The entire ultrasonic monitor may be encapsulated in plastic, a transmission medium, or both to provide water resistant properties.