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发明名称
Relay for railway signal systems
摘要
申请公布号
US1987144(A)
申请公布日期
1935.01.08
申请号
US19330657334
申请日期
1933.02.18
申请人
DINKEL JR PAUL
发明人
JR. PAUL DINKEL,
分类号
H01H50/42
主分类号
H01H50/42
代理机构
代理人
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