FuPing 发表于 2014-12-8 17:40) y8 Z" d4 B8 [) O; v4 z+ E x
谢谢您的回答,如果是您说的这个问题,是不是要卸掉浴缸?浴缸上我能拧开的地方都拧开了,什么都看不到, ...
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Could be condense water from some vents, like the drain vent thorough the roof... I have heard the dropping sound for 10 years but I did not find any thing before I sold the house.