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发明名称
Direct-current voltage transformation apparatus
摘要
申请公布号
US1920150(A)
申请公布日期
1933.07.25
申请号
US19320646194
申请日期
1932.12.07
申请人
THE CROSLEY RADIO CORPORATION
发明人
ROCKWELL RONALD J.
分类号
H02M3/42
主分类号
H02M3/42
代理机构
代理人
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地址
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