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发明名称
Mechanism for providing a precise reduction ratio in photographic copiers
摘要
申请公布号
US3259009(A)
申请公布日期
1966.07.05
申请号
US19630329821
申请日期
1963.12.11
申请人
SPERRY RAND CORPORATION
发明人
WALTER GERARD O.
分类号
G03B27/52
主分类号
G03B27/52
代理机构
代理人
主权项
地址
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