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发明名称
摘要
申请公布号
SU553232(A1)
申请公布日期
1977.04.05
申请号
SU19752157364
申请日期
1975.07.16
申请人
发明人
分类号
C04B35/567;C04B35/56;(IPC1-7):C04B35/56
主分类号
C04B35/567
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