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发明名称
Photoelectric colorimeter
摘要
申请公布号
US2193315(A)
申请公布日期
1940.03.12
申请号
US19380194368
申请日期
1938.03.07
申请人
EVELYN KENNETH A
发明人
EVELYN KENNETH A.
分类号
G01N21/25
主分类号
G01N21/25
代理机构
代理人
主权项
地址
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