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经营范围
发明名称
Flood packer
摘要
申请公布号
US1946353(A)
申请公布日期
1934.02.06
申请号
US19300450109
申请日期
1930.05.06
申请人
OIL WELL SUPPLY COMPANY
发明人
MACK PATRICK H.
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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