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发明名称
Relay
摘要
申请公布号
US1969064(A)
申请公布日期
1934.08.07
申请号
US19300442022
申请日期
1930.04.05
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
FIELD OSCAR S.
分类号
H01H50/20
主分类号
H01H50/20
代理机构
代理人
主权项
地址
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