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经营范围
发明名称
METHOD OF MINING OIL SEAMS DIFFERENT IN THICKNESS
摘要
申请公布号
SU1579988(A1)
申请公布日期
1990.07.23
申请号
SU19884368241
申请日期
1988.01.27
申请人
V NEFTEGAZOVYJ NI INSTITUT
发明人
BEZUKHOV PETR V,SU;ROZENBERG VYACHESLAV M,SU
分类号
E21B43/22
主分类号
E21B43/22
代理机构
代理人
主权项
地址
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