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发明名称
摘要
申请公布号
DE2063784(A1)
申请公布日期
1972.07.06
申请号
DE19702063784
申请日期
1970.12.24
申请人
发明人
分类号
B02C17/14;B02C19/18
主分类号
B02C17/14
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代理人
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地址
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