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发明名称
WASHOUT JOINT
摘要
申请公布号
US3508609(A)
申请公布日期
1970.04.28
申请号
USD3508609
申请日期
1967.09.19
申请人
ROCKWELL MFG. CO.
发明人
JOHN H. FOWLER;DAVID P. HERD
分类号
E21B33/043;E21B33/14;(IPC1-7):E21B7/12;E21B33/00
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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