1638| 7
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请教各位专家,关于用振动方式测木材内缺陷。 |
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发表于 2008-12-31 20:03
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建议
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发表于 2008-12-31 20:09
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木材的固有频率
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发表于 2011-5-14 14:42
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发表于 2011-5-15 16:55
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