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发明名称
Double range exposure meter
摘要
申请公布号
US3170023(A)
申请公布日期
1965.02.16
申请号
US19610102267
申请日期
1961.04.11
申请人
WESTON INSTRUMENTS, INC.
发明人
BARRY AUSTIN W.;SCHAKE RICHARD P.
分类号
G01J1/42
主分类号
G01J1/42
代理机构
代理人
主权项
地址
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