Unverified78% confidenceFactTime unknown
自动升降式门底密封条（drop-down seal）内部依靠弹簧联动，关门时触发销钉下压密封胶条，此类结构密封性能优于固定式但机构可能磨损需选金属传动件款
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78%
Confidence
Long-term
Relevance
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