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发明名称
Method and apparatus for determining illumination contrast
摘要
申请公布号
US2337122(A)
申请公布日期
1943.12.21
申请号
US19410407314
申请日期
1941.08.18
申请人
NORWOOD DONALD W
发明人
NORWOOD DONALD W.
分类号
G01J1/42
主分类号
G01J1/42
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