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发明名称
Photographic apparatus
摘要
申请公布号
US2051608(A)
申请公布日期
1936.08.18
申请号
US19340718157
申请日期
1934.03.30
申请人
FREDERIC P. WARFLELD
发明人
KEAN OTHO V.
分类号
G03B15/06
主分类号
G03B15/06
代理机构
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