還是外行話，馬桶根本沒有P trap，就是內部有彎曲的管道，就是底下的存水。

來源: 房崇於 2018-02-16 07:54:39 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.