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发明名称
摘要
申请公布号
GB1296049(A)
申请公布日期
1972.11.15
申请号
GBD1296049
申请日期
1969.12.11
申请人
发明人
分类号
C04B35/443;C01F7/16;C30B29/26
主分类号
C04B35/443
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代理人
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地址
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