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发明名称
Sliding back for cameras
摘要
申请公布号
US1933889(A)
申请公布日期
1933.11.07
申请号
US19320592592
申请日期
1932.02.12
申请人
BURNELL WILLIAM E
发明人
BURNELL WILLIAM E.
分类号
G03B19/02
主分类号
G03B19/02
代理机构
代理人
主权项
地址
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