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发明名称
LOCK FOR DRILL PIPES
摘要
申请公布号
SU960419(A1)
申请公布日期
1982.09.23
申请号
SU19813234795
申请日期
1981.01.12
申请人
TURKMENSKIJ GNI PI NEFTYANOJ PROMYSHLENNOSTI
发明人
BEDNYJ VASILIJ I,SU;PAKHMURIN GENRIKH A,SU
分类号
E21B17/043;(IPC1-7):E21B17/04
主分类号
E21B17/043
代理机构
代理人
主权项
地址
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