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发明名称
Transducers
摘要
申请公布号
US2824178(A)
申请公布日期
1958.02.18
申请号
US19540425607
申请日期
1954.04.26
申请人
PHILCO CORPORATION
发明人
BOBB LLOYD J.
分类号
H04R19/02
主分类号
H04R19/02
代理机构
代理人
主权项
地址
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