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发明名称
摘要
申请公布号
BE647734(A)
申请公布日期
1964.08.31
申请号
BED647734
申请日期
1964.05.11
申请人
发明人
分类号
C21D1/767;C21D9/00
主分类号
C21D1/767
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代理人
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