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发明名称
DIRECTIONAL DRILLING DEVICE
摘要
申请公布号
SU1484895(A1)
申请公布日期
1989.06.07
申请号
SU19874249835
申请日期
1987.05.26
申请人
UKHTINSKIJ INDUSTRIALNYJ INSTITUT
发明人
GERZHBERG YURIJ M,SU;CHARKOV VLADIMIR D,SU;STARTSEVA TAMARA G,SU
分类号
E21B7/10
主分类号
E21B7/10
代理机构
代理人
主权项
地址
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