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发明名称
REST FOR DRILL ROD
摘要
申请公布号
SU1571238(A1)
申请公布日期
1990.06.15
申请号
SU19884401735
申请日期
1988.04.01
申请人
LENIN VLADIMIR A,SU;BULAEV VYACHESLAV N,SU
发明人
LENIN VLADIMIR A,SU;BULAEV VYACHESLAV N,SU
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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