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经营范围
发明名称
Improvements in or relating to echo-sounding apparatus
摘要
申请公布号
GB756577(A)
申请公布日期
1956.09.05
申请号
GB19530032471
申请日期
1953.11.23
申请人
ELECTROACOUSTIC G.M.B.H.
发明人
BOLZMANN HANS;AHRENS ERHARD
分类号
G01S1/72
主分类号
G01S1/72
代理机构
代理人
主权项
地址
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