請問第四台訊號DB值應該在哪一個範圍? - 生活
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By Odelette
at 2011-03-21T00:00
at 2011-03-21T00:00
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請問第四台訊號DB值應該在哪一個範圍?去那邊買什麼儀器可以測量?儀器大概多少錢?
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By Jacob
at 2011-03-21T21:18
at 2011-03-21T21:18
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