The invention relates to a method for determining the distance between a radio beacon and a vehicle device passing in front of said radio beacon, in a road toll system. There is provided a control device 101 for interpreting a command received from a control device 120 and for carrying out an output processing to an output device 103 if it is decided that the received command is a command for giving an instruction for outputting data stored in a mass storage 102 to the output device 103 in a state of a connection to the control device. The ultraviolet photons ionize the sample gas and the resultant sample gas ions are then swept into a chemical detector by an electric field. As the addressing can be handled by a single conducting layer, the flexibility of the substrate is improved compared to multilayer substrates. and a contact angle on a silicon substrate of no greater than 18\xb0, in an amount of at least 40% by mass with respect to total mass of the organic solvent. By altering the bridge member orientation across the cavity on the rear surface, the club head can be made to propel a ball in various directions.