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发明名称
Improvements in or relating to precious metal articles
摘要
申请公布号
GB494956(A)
申请公布日期
1938.11.03
申请号
GB19370012520
申请日期
1937.05.03
申请人
WILLIAM DAVID JONES
发明人
分类号
C22C1/04
主分类号
C22C1/04
代理机构
代理人
主权项
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