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发明名称
ICE-DRILLING DEVICE
摘要
申请公布号
SU581227(A2)
申请公布日期
1977.11.25
申请号
SU19762371976
申请日期
1976.06.10
申请人
MO GORNYJ INSTITUT
发明人
KAPUSTIN ALEKSANDR A,SU;MOCHALOV VLADIMIR ,SU;MORIT RUDOLF E,SU;YANCHENKO GENNADIJ A,SU
分类号
E21B7/14;(IPC1-7):E21B7/14;E21C19/00;E21C21/00
主分类号
E21B7/14
代理机构
代理人
主权项
地址
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