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发明名称
PERCUSSION-ROTARY DRILLING TOOL
摘要
申请公布号
RU2000418(C1)
申请公布日期
1993.09.07
申请号
SU19914920540
申请日期
1991.03.21
申请人
KUSHELEVICH ALEKSANDR B
发明人
KUSHELEVICH ALEKSANDR B
分类号
E21B7/24;(IPC1-7):E21B7/24
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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