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摘要
申请公布号
GB1302725(A)
申请公布日期
1973.01.10
申请号
GB19700028257
申请日期
1970.06.11
申请人
发明人
分类号
C01F7/16;C04B7/32;C04B22/00;(IPC1-7):C04B35/60;C04B13/22
主分类号
C01F7/16
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