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[讨论] 焊材标准不规定屈服强度,只规定抗拉强度, |
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发表于 2022-8-29 00:08:26
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发表于 2022-8-27 19:13:36
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发表于 2022-8-27 23:37:15
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点评 |
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发表于 2022-8-29 08:05:38
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发表于 2022-8-29 14:58:38
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发表于 2022-8-30 10:29:01
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点评 |
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发表于 2022-8-31 19:41:02
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发表于 2022-9-2 08:09:32
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