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发明名称
摘要
申请公布号
GB1303944(A)
申请公布日期
1973.01.24
申请号
GB19710010952
申请日期
1971.04.23
申请人
发明人
分类号
C30B13/12;(IPC1-7):B01J17/10
主分类号
C30B13/12
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代理人
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地址
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