[KongchangAI]
Unverified85% confidenceSolutionTime unknown

疏通剂无效时的排查路径:先热水/开水冲(油脂类)→ 物理疏通(手摇弹簧或马桶吸)→ 对症化学疏通剂→ 拆P型存水弯清理→ 联系疏通师傅;化学剂对硬物/异物掉落无效

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