[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

PVC、PPR塑料管道对酶制剂无腐蚀风险,反而适合替代腐蚀性化学疏通剂;老旧金属铸铁管长期用强碱疏通剂会加速锈蚀,更应改用酶制剂

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Long-term
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