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发明名称
Improvements in echo sounding apparatus
摘要
申请公布号
GB711139(A)
申请公布日期
1954.06.23
申请号
GB19510001702
申请日期
1951.01.23
申请人
SOCIETE GENERALE D'ELECTRICITE ET DE RADIO
发明人
分类号
G01S15/10
主分类号
G01S15/10
代理机构
代理人
主权项
地址
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