| 摘要 |
Spikes 3 converge radially within a tubular framework for inflicting fatal injury to a trapped animal. The spikes are spring loaded and typically bait is located on one side of the spikes. Typically an anima, on reaching for the bait, contacts the spikes and on retracting its head is pierced by them. Typically the animal's nervous system causes it to retract and thus clear itself from the spikes.
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