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经营范围
发明名称
CORE ORIENTATION DEVICE
摘要
申请公布号
SU1509509(A1)
申请公布日期
1989.09.23
申请号
SU19874334695
申请日期
1987.11.30
申请人
VNI GEOLOGORAZVEDOCHNYJ I UGOLNYKH MESTOROZHDENIJ
发明人
SMIRNOV BORIS V,SU;LOBANOV BORIS S,SU
分类号
E21B25/16;E21B47/02
主分类号
E21B25/16
代理机构
代理人
主权项
地址
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