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发明名称
摘要
申请公布号
SU547946(A1)
申请公布日期
1977.02.25
申请号
SU19752172455
申请日期
1975.09.09
申请人
发明人
分类号
H02M7/02;(IPC1-7):H02M7/02
主分类号
H02M7/02
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代理人
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