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发明名称
IDENTIFICATION MARKINGS FOR GEMSTONES
摘要
申请公布号
GB2047215(B)
申请公布日期
1982.12.22
申请号
GB19790013406
申请日期
1979.04.18
申请人
DRESCHHOFF G A M;ZELLER E J
发明人
分类号
C04B41/00;(IPC1-7):C01B31/06
主分类号
C04B41/00
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代理人
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