水管清洗水龍頭噴出黃水？(新竹竹北莊敬五街熱水乍寒乍熱)

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https://www.youtube.com/watch?v=ehZNGjF-CwY

竹北水管清洗

管乾淨高週波水管清洗 - 清洗水管訓練中心