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发明名称
摘要
申请公布号
FR2077721(A1)
申请公布日期
1971.11.05
申请号
FR19700004534
申请日期
1970.02.09
申请人
BUNKER RAMO CORP
发明人
分类号
G04B27/00;G04C13/11;(IPC1-7):G04C3/00
主分类号
G04B27/00
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