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发明名称
Relay
摘要
申请公布号
US1964355(A)
申请公布日期
1934.06.26
申请号
US19310520422
申请日期
1931.03.05
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
HOVEY MARK H.
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
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