某牌直通管,超過3000轉才有聲音,100定速無聲,窗戶沒開也聽不太到聲音http://www.youtube.com/watch?v=8TLURQ5ck54http://www.youtube.com/watch?v=8TLURQ5ck54Claverj wrote:如題我想裝雙邊單出的...(恕刪)