关键拐点已至，中部大省'硬气'起来了
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每经记者|程晓玲 近日，国内首个年产能超40万克拉的智能切磨工厂在郑州正式投产。 项目落地，'标志着我国培育钻石产业成功补齐中游切磨加工这一关键短板'。 几乎同时，河南超硬材料行业上半年经营情况出炉：7家超硬材料上市公司及新三板企业中，6家实现营业收入、
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