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发明名称
Mécanisme de rotation double pour perforatrices
摘要
申请公布号
FR1253103(A)
申请公布日期
1961.02.03
申请号
FR19600823461
申请日期
1960.04.05
申请人
JOY MANUFACTURING COMPANY
发明人
分类号
E21B6/00;E21B6/06
主分类号
E21B6/00
代理机构
代理人
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地址
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