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发明名称
Phonograph needle
摘要
申请公布号
US1980511(A)
申请公布日期
1934.11.13
申请号
US19330675446
申请日期
1933.06.12
申请人
WENGER WILEY D
发明人
WENGER WILEY D.
分类号
G11B3/48
主分类号
G11B3/48
代理机构
代理人
主权项
地址
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