Unverified80% confidenceDecision RuleTime unknown
边缘防塌陷通常靠加硬边框弹簧或高密度海绵围边实现:坐床沿时下陷<3cm、能稳定支撑说明围边合格;无围边设计的床垫坐边缘易塌,实际睡眠可用面积会缩水10-15cm,小尺寸床更需关注
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Long-term
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