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摘要
申请公布号
US2282301(A)
申请公布日期
1942.05.05
申请号
US19390297751
申请日期
1939.10.03
申请人
PETERSEN CARL G
发明人
PETERSEN CARL G.
分类号
G01N15/06
主分类号
G01N15/06
代理机构
代理人
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