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摘要
申请公布号
US1898282(A)
申请公布日期
1933.02.21
申请号
US19290330192
申请日期
1929.01.04
申请人
EDWARD L. KAPPELMAN
发明人
ALMCRANTZ OSCAR G.
分类号
H02G3/14
主分类号
H02G3/14
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