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发明名称
摘要
申请公布号
DE2120999(A1)
申请公布日期
1971.11.18
申请号
DE19712120999
申请日期
1971.04.29
申请人
发明人
分类号
B04B3/00;B04B11/02;(IPC1-7):B04B11/00
主分类号
B04B3/00
代理机构
代理人
主权项
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