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发明名称
CHURN-DRILLING BIT
摘要
申请公布号
SU1133373(A1)
申请公布日期
1985.01.07
申请号
SU19833624521
申请日期
1983.07.21
申请人
V PROEKTNO-IZYSKATELSKIJ NII "GIDROPROEKT" IM.S.YA.ZHUKA
发明人
GOJ VLADIMIR L,SU
分类号
E21B10/36;(IPC1-7):E21B10/36
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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