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銅件上壓鉚螺母的問(wèn)題 |
評(píng)分
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點(diǎn)評(píng)
估計(jì)不會(huì)是純銅,材料成本擺在那里,另外又是折彎件,強(qiáng)度也會(huì)是個(gè)考量點(diǎn)。
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