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发明名称
TENSION GRIP FOR RISER
摘要
申请公布号
JPH0238696(A)
申请公布日期
1990.02.08
申请号
JP19890138982
申请日期
1989.05.31
申请人
CONOCO INC
发明人
RODERITSUKU JIEI MAIAASU;JIYOOJI EICHI DERUGEITO
分类号
E21B17/01;E21B19/00;E21B43/01
主分类号
E21B17/01
代理机构
代理人
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