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发明名称
SWITCHING APPARATUS
摘要
申请公布号
CA496152(A)
申请公布日期
1953.09.15
申请号
CAD496152
申请日期
申请人
NORTHERN ELECTRIC COMPANY
发明人
JOHN WICKS
分类号
主分类号
代理机构
代理人
主权项
地址
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