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发明名称
APPARATUS FOR EXPANDING HOLES
摘要
申请公布号
SU1479600(A1)
申请公布日期
1989.05.15
申请号
SU19874254797
申请日期
1987.06.02
申请人
REZNIK LEV A,SU;ROGACH MIKHAIL S,SU;SAVIN VALERIJ F,SU;PAVLOV VLADIMIR P
发明人
REZNIK LEV A,SU;ROGACH MIKHAIL S,SU;SAVIN VALERIJ F,SU;PAVLOV VLADIMIR P,SU
分类号
E21B7/28
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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