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发明名称
摘要
申请公布号
NL6902383(A)
申请公布日期
1969.08.19
申请号
NL19690002383
申请日期
1969.02.14
申请人
发明人
分类号
C01G23/053;(IPC1-7):C01G23/06
主分类号
C01G23/053
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