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发明名称
Controlling device
摘要
申请公布号
US2134405(A)
申请公布日期
1938.10.25
申请号
US19370167712
申请日期
1937.10.07
申请人
INGERSOLL-RAND COMPANY
发明人
HULSHIZER JOSEPH I.
分类号
E21B19/081
主分类号
E21B19/081
代理机构
代理人
主权项
地址
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