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发明名称
摘要
申请公布号
JPS5947556(B2)
申请公布日期
1984.11.20
申请号
JP19780079134
申请日期
1978.06.29
申请人
HITACHI LTD
发明人
MURAI TOORU
分类号
H02P1/44
主分类号
H02P1/44
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代理人
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