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发明名称
Pole changer control circuit
摘要
申请公布号
US2316730(A)
申请公布日期
1943.04.13
申请号
US19400363489
申请日期
1940.10.30
申请人
KELLOGG SWITCHBOARD AND SUPPLY COMPANY
发明人
WALLACE BERT A.
分类号
H04M19/02
主分类号
H04M19/02
代理机构
代理人
主权项
地址
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