[KongchangAI]
Unverified75% confidenceDecision RuleTime unknown

水垢厚度超过3-5mm或已结块的老旧热水器,单次浸泡难以清除,应先物理清理再化学浸泡,或分2-3次循环处理,避免一次性用超高浓度腐蚀内胆

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