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摘要
申请公布号
US2193028(A)
申请公布日期
1940.03.12
申请号
US19380236286
申请日期
1938.10.21
申请人
EASTMAN KODAK COMPANY
发明人
HOPKINS ROY S.
分类号
G03B27/62
主分类号
G03B27/62
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