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发明名称
DRILL BARREL
摘要
申请公布号
SU1645448(A1)
申请公布日期
1991.04.30
申请号
SU19894679518
申请日期
1989.04.17
申请人
GOJ VLADIMIR L
发明人
GOJ VLADIMIR L,SU
分类号
E21B27/00
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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