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发明名称
Radio beacon
摘要
申请公布号
US2173137(A)
申请公布日期
1939.09.19
申请号
US19370124785
申请日期
1937.02.08
申请人
NATH SHARMA DEVENDRA
发明人
SHARMA DEVENDRA NATH
分类号
G01S1/02;G01S19/41
主分类号
G01S1/02
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