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发明名称
摘要
申请公布号
PL93717(B1)
申请公布日期
1977.06.30
申请号
PL19750178346
申请日期
1975.02.26
申请人
发明人
分类号
C09B33/16;(IPC1-7):C09B33/16
主分类号
C09B33/16
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