[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

开口尺寸兼容性核对:窗框式通风器需匹配型材腔体宽度(常见60/70/80系列),墙体式需确认墙厚≥240mm并预留套管,安装前必须实测墙厚和窗框系列号

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