Provided is a random number generating device capable of generating highly irregular random numbers with a simple configuration. Particularly described are oligonucleotides that are useful as amplification primers and hybridization probes for detecting very low levels of Group B streptococci nucleic acids. Each junction location connects to line voltage along a current path which includes a resistance, so that current flow from line voltage to the respective junction location will cause that junction location to have a voltage lower than line voltage. The coordinates of the processed return signals are compared to coordinates of known objects in a pre-existing database to determine whether there is a match between the return signal and a known object. The guide is provided on each of circumferentially opposite sides of the cover to supply a coolant to the coil portion in a distributed manner. Each of the conductors has an end portion positioned within one of the conductor tracks of the cog-shaped conductor guide.