The present invention relates to an electronic voting system. In this method, a continuous unit to be continuously reproduced is determined, a stream is generated by encoding the moving image without switching between variable-length encoding schemes in the continuous unit, and management information is generated that includes a first flag information indicating that a variable-length encoding scheme is fixed in the continuous unit. According to the invention, on the surface of the water a second frequency f2, higher than the first frequency f1, is used for two-way telecommunications between the gas bottle and the wristop computer. A sprung axle is attached to the trailer frame with a plurality of spring hangers to which leaf springs are connected. A cover is included enclosing the two-liter bottle within the container.