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发明名称
DEVICE FOR WELL DRILLING
摘要
申请公布号
RU2021463(C1)
申请公布日期
1994.10.15
申请号
SU19914951789
申请日期
1991.06.28
申请人
VSESOYUZNYJ NAUCHNO-ISSLEDOVATELSKIJ INSTITUT BUROVOJ TEKHNIKI
发明人
GUSMAN MOISEJ T;KONSTANTINOV LEONID P;POLSHKOV VLADIMIR K;EDELMAN YAKOV A
分类号
E21B4/00;(IPC1-7):E21B4/00
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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