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发明名称
摘要
申请公布号
BE726032(A)
申请公布日期
1969.05.29
申请号
BED726032
申请日期
1968.12.24
申请人
发明人
分类号
C04B24/38;C04B28/02
主分类号
C04B24/38
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代理人
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地址
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