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[声学基础] 对于这个v=P/ρc公式不是很理解,请教各位高手是怎么得出来的? |
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发表于 2008-5-20 13:37
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发表于 2008-5-22 17:25
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发表于 2008-5-23 21:13
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发表于 2009-5-7 16:53
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