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发明名称
Photographic copying apparatus
摘要
申请公布号
US1821129(A)
申请公布日期
1931.09.01
申请号
US19270169198
申请日期
1927.02.18
申请人
ELLIS WEISKER
发明人
WEISKER ELLIS
分类号
G03B27/32
主分类号
G03B27/32
代理机构
代理人
主权项
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