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经营范围
发明名称
Coring apparatus
摘要
申请公布号
US2326435(A)
申请公布日期
1943.08.10
申请号
US19400336936
申请日期
1940.05.24
申请人
BYNUM PINK T
发明人
BYNUM PINK T.
分类号
E21B25/04
主分类号
E21B25/04
代理机构
代理人
主权项
地址
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