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怎樣區(qū)分各個(gè)領(lǐng)域的齒輪呢? |
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點(diǎn)評(píng)
原來這也能靠侃
評(píng)分
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點(diǎn)評(píng)
用的那幾家的鋼?加工流程,幾個(gè)步驟,分別留了多少進(jìn)給量?纯茨銈兊呐吡。鋼珠就不看了,太吵了。耳朵都聾了。
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