4432| 8
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怎么測(cè)量一個(gè)金屬帶材的彈性形變,? |
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點(diǎn)評(píng)
確定一個(gè)標(biāo)準(zhǔn)沒(méi)有問(wèn)題,,也可以使用拉力計(jì)拉。
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