An object to provide a hot plate making it possible to heat an object to be heated uniformly, and the hot plate of the present invention is characterized in that a resistance element having a thickness dispersion of \xb13 \u03bcm or less is formed on an insulating substrate. When the content to be shared is matched to reference content in the database, sharing may be simply rejected, or rights associated with the reference content may be inspected to facilitate determining authorization. R-plane surfaces of the sapphire substrate are exposed, and a silicon dioxide mask is formed on the main surface of the substrate. A bite-in portion is formed on the inner surface of the wire accommodating space for engaging the wire on an inner side of the bend to plastically deform the wire. The restrictor limits the flow of hydraulic fluid through the hydraulic pump, thus limiting its rotational speed and the rotational speed of the elevator drive motor to which it is attached, thereby allowing the elevator to descend at a safe speed.