1475| 11
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請問s和b如何來的呢?屈服點(diǎn)為何是s,,拉伸為何是b,? |
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點(diǎn)評
彈性極限和屈服極限是兩個(gè)概念,兩回事,,你當(dāng)一回事說明你基本概念不清
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