| 摘要 |
<p>A device for deterring birds from perching on a broad surfaced structure such as a boat or building, wherein electrically pulsed conductors are applied to the surface in a widely-spaced pattern of lines which will enable a bird to walk between adjacent lines but which are crossed in the bird"s passage to an edge of the surface. The electric pulse is of a quality harmless to the bird but sufficient to alarm it. </p> |
