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发明名称
Switching mechanism for a gramophone
摘要
申请公布号
US2814374(A)
申请公布日期
1957.11.26
申请号
US19540431183
申请日期
1954.05.20
申请人
DER HEEM JAN VAN
发明人
HEEM JAN VAN DER
分类号
主分类号
代理机构
代理人
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