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发明名称
Knuckle joint with lateral actuating means
摘要
申请公布号
US2726881(A)
申请公布日期
1955.12.13
申请号
US19530329703
申请日期
1953.01.05
申请人
HOWARD CLIFFORD M
发明人
HOWARD CLIFFORD M.
分类号
E21B7/08;E21B31/14
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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