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发明名称
Perfectionnement aux perforatrices
摘要
申请公布号
FR1464837(A)
申请公布日期
1967.01.06
申请号
FR19656946599
申请日期
1965.11.19
申请人
发明人
BIERMANN ALBERT
分类号
E21B19/084
主分类号
E21B19/084
代理机构
代理人
主权项
地址
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