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发明名称
摘要
申请公布号
CH647572(A4)
申请公布日期
1975.09.30
申请号
CH19720006475D
申请日期
1972.05.01
申请人
发明人
分类号
G04C3/00;G04G9/10;G04G17/02;(IPC1-7):G04C9/00;G04C17/00
主分类号
G04C3/00
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