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发明名称
摘要
申请公布号
DE2028599(A1)
申请公布日期
1971.01.07
申请号
DE19702028599
申请日期
1970.06.10
申请人
发明人
分类号
C01G23/07;(IPC1-7):C01G23/02
主分类号
C01G23/07
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代理人
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