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发明名称
摘要
申请公布号
DE1960535(A1)
申请公布日期
1971.08.05
申请号
DE19691960535
申请日期
1969.12.03
申请人
发明人
分类号
B22C23/02;(IPC1-7):B22C23/02
主分类号
B22C23/02
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代理人
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地址
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