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发明名称
Stop collar
摘要
申请公布号
US2998848(A)
申请公布日期
1961.09.05
申请号
US19570694263
申请日期
1957.11.04
申请人
B AND W, INCORPORATED
发明人
WRIGHT KENNETH A.;SOLUM JAMES R.
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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