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发明名称
摘要
申请公布号
FR2074236(A5)
申请公布日期
1971.10.01
申请号
FR19700046485
申请日期
1970.12.23
申请人
BELL ET HOWELL CY
发明人
分类号
G03B21/43;(IPC1-7):G03B1/00
主分类号
G03B21/43
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