Unverified85% confidenceDecision RuleTime unknown
PVC管道(现代住宅主流)避免使用高浓度硫酸型疏通剂,强放热会使PVC软化变形;强碱NaOH型对PVC相对安全,但也不宜长时间浸泡超过1小时
1
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85%
Confidence
Long-term
Relevance
-
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