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发明名称
WELLHEAD REPAIR COLLAR
摘要
申请公布号
GB9109655(D0)
申请公布日期
1991.06.26
申请号
GB19910009655
申请日期
1991.05.03
申请人
BISHOP, JOHN R
发明人
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主分类号
代理机构
代理人
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