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经营范围
发明名称
Bridging plug
摘要
申请公布号
US2345873(A)
申请公布日期
1944.04.04
申请号
US19410373903
申请日期
1941.01.10
申请人
LANE-WELLS COMPANY
发明人
HART MERIDA L.
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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