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发明名称
Wire line safety control packer
摘要
申请公布号
US2376605(A)
申请公布日期
1945.05.22
申请号
US19420428619
申请日期
1942.01.28
申请人
LAWRENCE RICHARD R
发明人
LAWRENCE RICHARD R.
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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