| 摘要 |
<p>A u-shaped metal bow, provided with one or more thin wires attached to the transversal segment, is swivel mounted to a rectangular wooden base. The bow is bent back and kept down by a wire with a ring shaped front end guided from the rear of the base to the center. A second wire bent into a right angle is inserted into the ring with its shorter segment from below. When the bird touches the second wire, the ring is released, the bow moves quickly to the front and the bird receives a light slap from the attached thin wire.</p> |
