那麽怎麽知道什麽時候固體廢棄物需要pump out 呢?還是隻是看年頭(3-5年,上次聽壇子裏的人說depends how many people live in the house),那如果需要pump out 了,下水有什麽表現?先謝謝老大!
那麽怎麽知道什麽時候固體廢棄物需要pump out 呢?還是隻是看年頭(3-5年,上次聽壇子裏的人說depends how many people live in the house),那如果需要pump out 了,下水有什麽表現?先謝謝老大!
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