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发明名称
Improvements in or relating to acoustic diaphragms
摘要
申请公布号
GB354018(A)
申请公布日期
1931.08.06
申请号
GB19300019886
申请日期
1930.06.30
申请人
SKALA RESEARCH LABORATORIES INC.
发明人
分类号
H04R7/10
主分类号
H04R7/10
代理机构
代理人
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