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经营范围
发明名称
CORE BARREL
摘要
申请公布号
SU1631159(A1)
申请公布日期
1991.02.28
申请号
SU19894652980
申请日期
1989.02.01
申请人
DO POLT INSTITUT
发明人
CHALENKO ALEKSANDR A,SU;CHALENKO DMITRIJ A,SU
分类号
E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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