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发明名称
Film magazine
摘要
申请公布号
US2273274(A)
申请公布日期
1942.02.17
申请号
US19380246728
申请日期
1938.12.19
申请人
KROUSE GEORGE D
发明人
KROUSE GEORGE D.
分类号
G03B21/32
主分类号
G03B21/32
代理机构
代理人
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