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发明名称
DRILLING TOOL
摘要
申请公布号
SU1467164(A1)
申请公布日期
1989.03.23
申请号
SU19874251405
申请日期
1987.05.28
申请人
GOJ VLADIMIR L
发明人
GOJ VLADIMIR L,SU
分类号
E21B49/02;E21B25/00
主分类号
E21B49/02
代理机构
代理人
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