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发明名称
摘要
申请公布号
SU495389(A1)
申请公布日期
1975.12.15
申请号
SU19742025961
申请日期
1974.05.21
申请人
发明人
分类号
C22F1/00;(IPC1-7):C22F1/00
主分类号
C22F1/00
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代理人
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地址
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