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发明名称
ROTARY DRILLING BIT
摘要
申请公布号
SU791895(A1)
申请公布日期
1980.12.30
申请号
SU19772551446
申请日期
1977.12.07
申请人
TATARSKIJ G NAUCHNO- I PI NEFTYANOJ PROMYSHLENNOSTI
发明人
SAFONOV YURIJ A,SU;SHAYAKHMETOV SHAMIL K,SU;SALAMATIN VALENTIN V,SU;MAKHANKO VITALIJ D,SU
分类号
E21B10/25;E21B10/22;(IPC1-7):E21B10/22
主分类号
E21B10/25
代理机构
代理人
主权项
地址
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