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经营范围
发明名称
Presse-étoupe pour puits
摘要
申请公布号
FR1360012(A)
申请公布日期
1964.04.30
申请号
FR19630932516
申请日期
1963.04.24
申请人
BAKER OIL TOOLS, INC.
发明人
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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