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发明名称
Core barrel
摘要
申请公布号
US1761292(A)
申请公布日期
1930.06.03
申请号
US19290385838
申请日期
1929.08.14
申请人
BONE JOSEPH G
发明人
BONE JOSEPH G.
分类号
E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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