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发明名称
MECHANICAL FOCUS MAINTAINING APPARATUS
摘要
申请公布号
CA778126(A)
申请公布日期
1968.02.13
申请号
CAD778126
申请日期
申请人
BELL AND HOWELL COMPANY
发明人
ELMER C. HENRIKSEN
分类号
主分类号
代理机构
代理人
主权项
地址
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