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发明名称
Improvements in or relating to gramophones
摘要
申请公布号
GB339973(A)
申请公布日期
1930.12.16
申请号
GB19300032220
申请日期
1929.08.16
申请人
LEONARD EUGENE COWEY
发明人
分类号
G11B17/16
主分类号
G11B17/16
代理机构
代理人
主权项
地址
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