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发明名称
Slip
摘要
申请公布号
US1864953(A)
申请公布日期
1932.06.28
申请号
US19290417303
申请日期
1929.12.30
申请人
THE GUIBERSON CORPORATION
发明人
STANDLEE HARVEY R.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
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