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母材的伸长率为35%,厚度为16mm,试样厚度t怎么取,如果是面弯和背弯,A怎么取? |
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发表于 2017-7-1 14:21:09
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发表于 2018-4-13 10:27:31
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发表于 2018-9-12 10:56:31
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