3036| 5
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[声学基础] [请教] 振动信号主频与发动机转速之间的关系 |
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发表于 2006-8-15 13:56
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发表于 2006-9-28 23:02
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发表于 2007-1-4 16:43
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发表于 2007-1-4 20:58
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可能是进排气,或者燃烧激发的高阶谐波。
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