A gaming system displays a plurality of bingo cards each containing at least one column, each column having at least one square. The method includes creating an accounting data base for a mobile station, determining whether a state transition of the MS occurs, if the state transition of the MS occurs, updating state information in the accounting DB, and transmitting the accounting information including the state information to an accounting server. The elongate rods retain a desired number of blades in a pivotal manner, within annular channels formed between the annular collars. The invention allows for the elimination of vacuum stages or a reduction in vacuum pumping speed if the same number of vacuum stages is employed. Subsequently, if the second voltage is higher than the first voltage, the third switch element is controlled to be turned on.