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发明名称
Spool supporting and positioning means in photographic printers
摘要
申请公布号
US2305636(A)
申请公布日期
1942.12.22
申请号
US19410393585
申请日期
1941.05.15
申请人
RICHARDS WILLIAM H
发明人
RICHARDS WILLIAM H.
分类号
G03B27/06
主分类号
G03B27/06
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代理人
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