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发明名称
Improvements in and relating to gramophones
摘要
申请公布号
GB331477(A)
申请公布日期
1930.07.03
申请号
GB19290008466
申请日期
1929.08.08
申请人
JOSEPH HARRISON THOMSON ROBERTS
发明人
分类号
G03B31/00
主分类号
G03B31/00
代理机构
代理人
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