Unverified80% confidenceDecision RuleTime unknown
宽度超过80cm的单跨层板中部易下垂，非顶撑款需选中间带支撑脚或加厚（板厚≥18mm）的层板，否则放重物长期使用后中间塌陷
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80%
Confidence
Long-term
Relevance
-
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