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发明名称
Series switch
摘要
申请公布号
US1770894(A)
申请公布日期
1930.07.15
申请号
US19270167263
申请日期
1927.02.10
申请人
JOHANN VALERIUS
发明人
VALERIUS JOHANN
分类号
H01H1/58
主分类号
H01H1/58
代理机构
代理人
主权项
地址
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