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发明名称
摘要
申请公布号
DD121036(A1)
申请公布日期
1976.07.12
申请号
DD19750188815
申请日期
1975.10.11
申请人
发明人
分类号
B03C3/66;(IPC1-7):B03C3/66
主分类号
B03C3/66
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