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发明名称
Electric regulation
摘要
申请公布号
US1850449(A)
申请公布日期
1932.03.22
申请号
US19290367958
申请日期
1929.06.03
申请人
CREVELING JOHN L
发明人
CREVELING JOHN L.
分类号
H02J7/32
主分类号
H02J7/32
代理机构
代理人
主权项
地址
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