A method includes storing game record groups at a game server adapted to communicate with a number of gaming sites. A device key as a base for generating an encryption key is common to the plurality of optical disc devices. In addition, the enzyme exhibits almost no oxidizing activity toward either configuration of ethyl 4-chloro-3-hydroxybutyrate, performing only the reducing reaction of ethyl, 4-chloroacetoacetate. A compressor controller is connected to a controller of the blow-moulding machine in such a way that the controller of the blow-moulding machine generates a setpoint value for the initial pressure which is provided by the compressor.