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经营范围
发明名称
PLUGGING DEVICE
摘要
申请公布号
RU1808994(C)
申请公布日期
1993.04.15
申请号
SU19914908707
申请日期
1991.02.07
申请人
VSESOYUZNYJ NAUCHNO-ISSLEDOVATELSKIJ GEOLOGORAZVEDOCHNYJ INSTITUT UGOLNYKH MESTOROZHDENIJ
发明人
LOBANOV BORIS S
分类号
E21B27/02;(IPC1-7):E21B33/132
主分类号
E21B27/02
代理机构
代理人
主权项
地址
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