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发明名称
Vacuum electric switch and plate
摘要
申请公布号
US2248846(A)
申请公布日期
1941.07.08
申请号
US19400334263
申请日期
1940.05.09
申请人
BREWER JOHN A
发明人
BREWER JOHN A.
分类号
G04F1/00
主分类号
G04F1/00
代理机构
代理人
主权项
地址
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