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发明名称
Membran-Lautsprecher.
摘要
申请公布号
CH146596(A)
申请公布日期
1931.04.30
申请号
CHD146596
申请日期
1928.08.13
申请人
WHITMORE,WILLIAM BONES
发明人
BONES WHITMORE,WILLIAM
分类号
主分类号
代理机构
代理人
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