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发明名称
Improvements in or relating to methods of echo sounding
摘要
申请公布号
GB453164(A)
申请公布日期
1936.09.07
申请号
GB19350007448
申请日期
1935.03.09
申请人
ALEXANDER ASKENASY
发明人
分类号
G01S13/12;G01S15/12
主分类号
G01S13/12
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代理人
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