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发明名称
摘要
申请公布号
SU454191(A1)
申请公布日期
1974.12.25
申请号
SU19721807666
申请日期
1972.07.10
申请人
发明人
分类号
C04B35/20;C04B35/18;(IPC1-7):C04B35/20
主分类号
C04B35/20
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