Unverified75% confidenceFactTime unknown
运动型防摔裤的护垫多用发泡EVA或聚氨酯，反复剧烈冲击后会永久压缩失去回弹，需定期检查更换；老人日常款冲击少但需关注反复洗涤后护垫是否变形硬化
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