| 摘要 |
A plurality of rod-like vibration elements are fixed onto the outer circumferential surface of the exterior wall of the tank of a transformer. Each rod-like vibration element consists of a beam portion extending in parallel to the outer circumferential surface of the exterior wall and a fitting portion having one end thereof fixed to the beam portion and the other fixed onto the outer circumferential surface of the exterior wall of the tank. The width D of the beam portion in the direction perpendicular to the outer circumferential surface of the exterior wall of the tank is selected to be greater than the width W of the beam portion in the direction at right angles to the width D.
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