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经营范围
发明名称
Acoustic wave transmission devices
摘要
申请公布号
GB518851(A)
申请公布日期
1940.03.08
申请号
GB19380026387
申请日期
1938.09.09
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H04R1/40
主分类号
H04R1/40
代理机构
代理人
主权项
地址
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