Abstract: A sheet for exterminating rats by electric shock includes two plastic sheets in the form of upper and lower layered sheets. A grid-type copper foil pattern of straight lines with a fixed width, intersecting at right angles, is formed as first electrodes on the upper surface of the upper sheet, and windows are opened through rectangular areas surrounded by the copper foil pattern. A copper foil pattern is formed as second electrodes on the upper surface of the lower sheet, and has the same pattern as the copper foil pattern formed on the upper surface of the upper sheet. The upper sheet and the lower sheet are layered on each other so that the intersecting points in the copper foil pattern formed on the upper surface of the lower sheet are placed at the centers of the windows.

Abstract: A sheet for exterminating rats by electric shock (200) includes two plastic sheets (an upper sheet (210) and a lower sheet (220)) which are layered, wherein a grid-type copper foil pattern (211) of straight lines with a fixed width intersecting at right angles is formed as first electrodes on the upper surface of the upper sheet (210), windows (212) are opened through rectangular areas surrounded by the copper foil pattern (211), a copper foil pattern (221) having the same pattern as the copper foil pattern (211) formed on the upper surface of the upper sheet (210) is formed as second electrodes on the upper surface of the lower sheet (220), and the upper sheet (210) and the lower sheet (220) are layered on each other so that the intersecting points in the copper foil pattern (221) are placed at the centers of the windows (212).

Abstract: The object of the present invention is to provide a safe, easy-to-manage, successive, and swift method and system for preventing granulated blast-furnace slag from solidifying. Carbonated water is generated by dissolving carbon dioxide in water. Granulated blast-furnace slag which has been cooled is immersed in the generated carbonated water.