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发明名称
Automatic device for continuous sounding at sea by echoes of hammer blows
摘要
申请公布号
GB401234(A)
申请公布日期
1933.11.09
申请号
GB19330019090
申请日期
1933.07.05
申请人
PIERRE AUGUSTE DANIEL MARTI
发明人
分类号
G10K9/10
主分类号
G10K9/10
代理机构
代理人
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地址
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