Unverified78% confidenceDecision RuleTime unknown
铝箔伸缩管越拉伸内壁波纹越平整、阻力越小;安装时应尽量拉直到最大长度而非压缩使用,压缩状态下的密集波纹可使排烟阻力增加30%以上
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78%
Confidence
Long-term
Relevance
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