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发明名称
SPRING-LOADED ACCUMULATOR FOR DOWNHOLE HYDRAULIC PERCUSSION DRILLS
摘要
申请公布号
RU2100558(C1)
申请公布日期
1997.12.27
申请号
RU19950110465
申请日期
1995.06.22
申请人
INSTITUT GORNOGO DELA SO RAN
发明人
LIPIN ANATOLIJ A;MEZENTSEV IGOR V;KONOVALOV ANATOLIJ P;MARUS VIKTOR I
分类号
E21B4/14;(IPC1-7):E21B4/14
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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