| 摘要 |
An improved bird repellent device which is simple and inexpensive to produce and install, yet which is 100% effective in preventing birds from landing or nesting on the protected structure by presenting a surface which projects outwardly from the protected structure at an angle in excess of 25° is impossible for birds to land or nest on and which can be installed quickly and easily on substantially any structure to be protected and is 100% effective in preventing landing or nesting of birds.
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