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发明名称
摘要
申请公布号
DE2162759(A1)
申请公布日期
1972.09.14
申请号
DE19712162759
申请日期
1971.12.17
申请人
MC GRAW EDISON CO
发明人
分类号
D06F23/06;D06F37/00;D06F37/28;(IPC1-7):D06F21/10
主分类号
D06F23/06
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