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发明名称
COMMUTATOR
摘要
申请公布号
GB9010947(D0)
申请公布日期
1990.07.04
申请号
GB19900010947
申请日期
1990.05.16
申请人
BOWMAN, DAVID T
发明人
分类号
主分类号
代理机构
代理人
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