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发明名称
Well cap
摘要
申请公布号
GB9821739(D0)
申请公布日期
1998.12.02
申请号
GB19980021739
申请日期
1998.10.07
申请人
PLEXUS OCEAN SYSTEMS LIMITED
发明人
分类号
E21B17/10;E21B33/00;E21B33/04;E21B33/043
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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