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发明名称
Rotary draw works
摘要
申请公布号
US1925314(A)
申请公布日期
1933.09.05
申请号
US19300473808
申请日期
1930.08.08
申请人
THE NATIONAL SUPPLY COMPANY
发明人
FAULKNER DAVID S.;TIMBS EDWARD
分类号
E21B19/00
主分类号
E21B19/00
代理机构
代理人
主权项
地址
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