Unverified50% confidenceDecision RuleTime unknown
真空保温层是关键：双层304不锈钢真空结构6小时后仍能保持50℃以上，而普通夹层保温（非真空）3小时就降到40℃以下失去锁温意义
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50%
Confidence
Long-term
Relevance
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