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经营范围
发明名称
An improved well packer
摘要
申请公布号
GB428014(A)
申请公布日期
1935.05.03
申请号
GB19340026940
申请日期
1934.09.19
申请人
DERMOT LOUIS TAAFFE O'CONNOR
发明人
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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