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发明名称
Depth of field indicator
摘要
申请公布号
US2527106(A)
申请公布日期
1950.10.24
申请号
US19470754962
申请日期
1947.06.16
申请人
STEREOCRAFT ENGINEERING CO.
发明人
SMITH GORDON N.
分类号
G03B17/02
主分类号
G03B17/02
代理机构
代理人
主权项
地址
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