Water pump noise is a howling noise

來源: xxhhwxc 於 2009-05-21 09:36:19 [] [舊帖] [給我悄悄話] 閱讀數 : (29 bytes)
回答: Use a sethoscope to listen to noise 由 internuts 於 2009-05-20 18:20:42

Which should be easy to tell.

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