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发明名称
FLOATING SEGMENT BEARING
摘要
申请公布号
US3549214(A)
申请公布日期
1970.12.22
申请号
USD3549214
申请日期
1969.06.13
申请人
SMITH IND. INTERN. INC.
发明人
WILLIAM J. NEILSON
分类号
E21B10/22;F16C17/03;(IPC1-7):F16C17/03;F16C19/14
主分类号
E21B10/22
代理机构
代理人
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地址
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