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Repetitive loading of a structure during vibration may bring about its failure at astress much lower than the static strength. Such a failure can often be attributed to aphenomenon called fatigue. This type of failure has occurred in steel railroad
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只看楼主 我来说两句-
h269351255
沙发
2012-08-04 12:03:04
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lt0204991
板凳
在哪下载啊？
2010-07-13 21:47:13
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