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发明名称
Presse-étoupe pouvant former bouchon pour puits
摘要
申请公布号
FR1358712(A)
申请公布日期
1964.04.17
申请号
FR19630931235
申请日期
1963.04.11
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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