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摘要
申请公布号
US2214968(A)
申请公布日期
1940.09.17
申请号
US19370145679
申请日期
1937.06.01
申请人
MACMILLEN JOHN W
发明人
MACMILLEN JOHN W.
分类号
H02G3/12
主分类号
H02G3/12
代理机构
代理人
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