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发明名称
Distance measurements by sonic means
摘要
申请公布号
US2780795(A)
申请公布日期
1957.02.05
申请号
US19530358220
申请日期
1953.05.28
申请人
AMBROSIO BIAGIO F
发明人
AMBROSIO BIAGIO F.
分类号
G01S7/52;G01S15/14
主分类号
G01S7/52
代理机构
代理人
主权项
地址
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