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发明名称
摘要
申请公布号
SU381144(A1)
申请公布日期
1973.05.15
申请号
SU19711605704
申请日期
1971.01.04
申请人
发明人
分类号
H02M7/501;H02M1/12;(IPC1-7):H02M7/52
主分类号
H02M7/501
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