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发明名称
Bridging plug
摘要
申请公布号
US2715441(A)
申请公布日期
1955.08.16
申请号
US19510228088
申请日期
1951.05.24
申请人
DRESSER INDUSTRIES, INC.
发明人
BOUVIER GEORGE A.
分类号
E21B33/129
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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