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发明名称
Twin-lens reflex camera
摘要
申请公布号
US2518718(A)
申请公布日期
1950.08.15
申请号
US19480054250
申请日期
1948.10.13
申请人
KARL RATH
发明人
RATH KARL
分类号
G03B13/20
主分类号
G03B13/20
代理机构
代理人
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