A method, apparatus, and computer instructions are disclosed for displaying the true status of hierarchical operations being performed in a data processing system. The resulting field insulating structure has three distinct regions distinguished by the vertical offset from a reference plane defined by the surface of the active regions. Hence, user’s convenience can be promoted by allowing the user to control the electrical appliance on the optimal condition. When the element is actuated through a larger stroke length, a larger volume per unit stroke length is delivered. The head of the bolt contacts the outer circumferential surface of the fitting so that the bolt cannot turn as the nut is turned. 3% at wavelengths of from 430 nm to 500 nm inclusive when irradiated with a linearly polarized light with a vibration plane parallel to an absorption axis of said film, and a light transmittance of not less than 77% at wavelengths of from 430 nm to 500 nm inclusive when irradiated with a linearly polarized light with a vibration plane perpendicular to the absorption axis of said film.