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发明名称
Electrical apparatus
摘要
申请公布号
US1932329(A)
申请公布日期
1933.10.24
申请号
US19300470451
申请日期
1930.07.24
申请人
PIONEER INSTRUMENT COMPANY, INCORPORATED
发明人
URFER ADOLF
分类号
主分类号
代理机构
代理人
主权项
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