The circuit configuration mixes an input signal with an oscillator signal. The mount includes a base member affixed to the snowboard by fasteners extending through positioning holes. 5 to 15% by weight of one or more PO-rich polyols having a functionality of 1 to 4 and a combined number average equivalent weight of 2,000 to 6,000. When the bottom plate 4a is flexed by inserting the tape cassette T between the gripping members 4e, due to the urging force thus generated, the gripping members 4e are flexibly brought into contact with the side faces of the tape cassette T. When the rotational speed increases above a certain pre-determined level, the shroud is pushed upwards towards the inlet opening and a portion of the vanes becomes covered. Each component x is adapted atomically and then the table of relations is updated appropriately.