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发明名称
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摘要
申请公布号
US2318197(A)
申请公布日期
1943.05.04
申请号
US19420441823
申请日期
1942.05.05
申请人
LEEDS AND NORTHRUP COMPANY
发明人
CLARK WILLIAM RUSSELL
分类号
G01R25/00
主分类号
G01R25/00
代理机构
代理人
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