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发明名称
Kobling til bruk for aa koble et stigerör til et undervanns brönnhode
摘要
申请公布号
NO306417(B1)
申请公布日期
1999.11.01
申请号
NO19920001725
申请日期
1992.04.30
申请人
FMC CORP
发明人
VALKA, WILLIAM A.
分类号
E21B33/038;E21B33/043;F16L37/12;(IPC1-7):E21B33/04
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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