[KongchangAI]
Unverified75% confidenceCautionTime unknown

老旧铸铁下水管道不建议直接塞硅胶芯防虫盖,管口不规则、内壁毛糙密封不严,应选带外扩橡胶密封圈的整体式地漏或先做管口整形

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