[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

单层承重需匹配用途:放书籍/重物的层板厚度应≥25mm且跨度≤80cm,跨度每增加10cm挠度呈非线性增大,长跨度层板放满书3年内必然中部下弯

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