国检NGTC证书如何标切工等级的？

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　　国检NGTC证书如何标切工等级的？国检NGTC证书的钻石的切工等级都是给出的台宽和亭深的详细比例，大家可以具体上面的比例来计算出相对应的等级哦!更多钻石证书信息，请多多关注本网站。推荐阅读：GIA证书与国检证书有哪些区别