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发明名称
Rotary
摘要
申请公布号
US1929183(A)
申请公布日期
1933.10.03
申请号
US19290406710
申请日期
1929.11.12
申请人
AMERICAN WELL AND PROSPECTING COMPANY
发明人
ZILEN VICTOR W.
分类号
E21B3/04
主分类号
E21B3/04
代理机构
代理人
主权项
地址
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