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发明名称
Photometric device
摘要
申请公布号
US2268105(A)
申请公布日期
1941.12.30
申请号
US19400347261
申请日期
1940.07.24
申请人
BING JOSEPH M
发明人
BING JOSEPH M.
分类号
G03B7/099
主分类号
G03B7/099
代理机构
代理人
主权项
地址
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