Unverified80% confidenceFactTime unknown
框架材质影响寿命：优质沙发内框用实木（如桦木、松木）或高强度金属，劣质用密度板/多层胶合板，长期承重易变形。回弹支撑多用蛇形弹簧或高弹绷带，蛇形弹簧支撑更稳
1
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80%
Confidence
Long-term
Relevance
-
First Seen
Sources
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