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发明名称
Double frequency transducer
摘要
申请公布号
US3109112(A)
申请公布日期
1963.10.29
申请号
US19620179497
申请日期
1962.03.13
申请人
LESTER ROBERT A
发明人
LESTER ROBERT A.
分类号
G01F1/66
主分类号
G01F1/66
代理机构
代理人
主权项
地址
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