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发明名称
摘要
申请公布号
SU486000(A1)
申请公布日期
1975.09.30
申请号
SU19741992367
申请日期
1974.01.25
申请人
发明人
分类号
C04B35/80;C04B35/52;C04B35/58;(IPC1-7):C04B35/58
主分类号
C04B35/80
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