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发明名称
Process for manufacturing gun-rings
摘要
申请公布号
GB471881(A)
申请公布日期
1937.09.13
申请号
GB19350034408
申请日期
1935.12.11
申请人
RUDOLF VON FROMMER
发明人
分类号
B21D53/00;F41C23/00
主分类号
B21D53/00
代理机构
代理人
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