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发明名称
Apparatus for projecting diapositives
摘要
申请公布号
US1857268(A)
申请公布日期
1932.05.10
申请号
US19270161204
申请日期
1927.01.14
申请人
HUGO WIRTSCHAFTER
发明人
WIRTSCHAFTER HUGO
分类号
G03B23/12
主分类号
G03B23/12
代理机构
代理人
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地址
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