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          寶石行業


          實驗室培育鉆石是通過分析掌握天然鉆石的化學成分、物理特性和自然成因,在實驗室里模擬天然寶石的自然形成環境從而培育出與天然寶石成分、特性均完全一致的寶石。其化學、物理、原子、光及所有特性與天然鉆石相同,可用作珠寶和首飾。


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          清纯白丝学生脱裙子自慰
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