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发明名称
Controlling device
摘要
申请公布号
US2224553(A)
申请公布日期
1940.12.10
申请号
US19400332895
申请日期
1940.05.02
申请人
INGERSOLL-RAND COMPANY
发明人
SLATER FRED M.
分类号
E21B19/086;F01B11/00
主分类号
E21B19/086
代理机构
代理人
主权项
地址
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