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发明名称
Core barrel
摘要
申请公布号
US2005989(A)
申请公布日期
1935.06.25
申请号
US19330674655
申请日期
1933.06.07
申请人
BAKER OIL TOOLS, INC.
发明人
BURT CLARENCE E.
分类号
E21B4/10;E21B25/00
主分类号
E21B4/10
代理机构
代理人
主权项
地址
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