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发明名称
SIDE-WALL SAMPLE TAKER FOR UNSTABLE ROCK
摘要
申请公布号
SU1470947(A1)
申请公布日期
1989.04.07
申请号
SU19874268806
申请日期
1987.05.15
申请人
GOJ VLADIMIR L
发明人
GOJ VLADIMIR L,SU
分类号
E21B49/04
主分类号
E21B49/04
代理机构
代理人
主权项
地址
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