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发明名称
Rotary slip
摘要
申请公布号
US1745409(A)
申请公布日期
1930.02.04
申请号
US19230681336
申请日期
1923.12.18
申请人
DECKER OIL TOOL COMPANY
发明人
DECKER HARRY R.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
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地址
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