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经营范围
发明名称
Light meter
摘要
申请公布号
US2684610(A)
申请公布日期
1954.07.27
申请号
US19500202711
申请日期
1950.12.26
申请人
NORWOOD DONALD W
发明人
NORWOOD DONALD W.
分类号
G01J1/16
主分类号
G01J1/16
代理机构
代理人
主权项
地址
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