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发明名称
Indicator
摘要
申请公布号
US2199784(A)
申请公布日期
1940.05.07
申请号
US19370130126
申请日期
1937.03.10
申请人
JOHN D. FREDERICKS, JR.
发明人
DICKSON JAMES T.
分类号
F02P17/00;G01R23/02
主分类号
F02P17/00
代理机构
代理人
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