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3D打印成熟以后會不會取代機加工? |
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點評
所有金屬都可以嗎?打完能保證力學性能嗎,微量元素能均勻嗎,現(xiàn)在問題是能還是不能,
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點評
無古代人基因就不可能從石頭里蹦出現(xiàn)代人來
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