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发明名称
摘要
申请公布号
FR1589889(A)
申请公布日期
1970.04.06
申请号
FRD1589889
申请日期
1968.10.24
申请人
发明人
分类号
C04B7/44;C04B7/02;C04B7/32;C04B7/43
主分类号
C04B7/44
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