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发明名称
Improvements in damping arrangements for acoustic instruments
摘要
申请公布号
GB345679(A)
申请公布日期
1931.03.27
申请号
GB19290039622
申请日期
1929.12.27
申请人
STANDARD TELEPHONES AND CABLES, LIMITED;WILLIAM ALFRED LOVEDAY
发明人
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
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