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发明名称
LOUD-SPEAKER
摘要
申请公布号
CA306496(A)
申请公布日期
1930.12.09
申请号
CAD306496
申请日期
申请人
GEORGE REX SEARLE
发明人
GEORGE REX SEARLE
分类号
主分类号
代理机构
代理人
主权项
地址
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