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发明名称
DEVICE FOR CONNECTING RODS AND AUGERS AT ROTARY DRILLING
摘要
申请公布号
SU836335(A1)
申请公布日期
1981.06.07
申请号
SU19762413603
申请日期
1976.10.25
申请人
KAZAKHSKIJ NI PK EXI "GIPROUGLEGORMASH"
发明人
VEJS VIKTOR R,SU;PUZYRKOV MIKHAIL K,SU;KUSHCHANOV GUMAR K,SU
分类号
E21B17/046;(IPC1-7):E21B17/04
主分类号
E21B17/046
代理机构
代理人
主权项
地址
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