A throttle device which prevents the entry of foreign compounds into a slidable contact portion between a brush and a commutator is provided to prevent the malfunctioning of a motor. The correlator includes a frame with two laterally and freely rotatable belts. After the rolling of the dice has been stopped, the dice gaming machine identifies a winning bet area based on the dice rolling result. The retaining screw hole may also include a counter bore for receipt of a locator pin that is used during subsequent formation of wheel bolt holes in the spindle. Here, between the same conductive type transistors of the peripheral circuit, a channel impurity concentration of a transistor to which a driving voltage which drives the word line is applied is different from a channel impurity concentration of a transistor to which a voltage which is lower than the driving voltage is applied.