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发明名称
ELECTROMAGNETIC YOKE
摘要
申请公布号
GB8424597(D0)
申请公布日期
1984.11.07
申请号
GB19840024597
申请日期
1984.09.28
申请人
OILFIELD INSPECTION SERVICES LTD
发明人
分类号
主分类号
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代理人
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