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发明名称
Bearing Assembly for a Downhole Motor
摘要
申请公布号
CA2071611(A1)
申请公布日期
1993.12.19
申请号
CA19922071611
申请日期
1992.06.18
申请人
WENZEL, WILLIAM
发明人
WENZEL, WILLIAM
分类号
E21B4/00;F16D41/066;(IPC1-7):F16C19/00
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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