Abstract: A damping device for a tower-like structure, includes a liquid column tube having an arbitrary shape and a pair of opposite upstanding end portions thereof where liquid levels are formed, and an orifice provided at an intermediate portion within the liquid column tube, the liquid column tube being mounted upon the tower-like structure. The damping property of the damping device can be quantitatively defined by employing the orifice. Furthermore, as the intermediate portion of the liquid column tube defined between the opposite upstanding end portions can be appropriately configured, the installation space for the damping device is optimized.

Abstract: A finger skirt for an air-cushion vehicle wherein the bottom edge of each finger skirt, when it is in the state of inflation by the pressurized air for the levitation of the hull, is shaped so that it extends horizontally at the location where it comes in contact with the pressure-receiving surface, the bottom edge being formed so that its cross section is a circular arc.