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经营范围
发明名称
MINERAL MINING METHOD
摘要
申请公布号
SU754047(A1)
申请公布日期
1980.08.07
申请号
SU19772560755
申请日期
1977.12.30
申请人
PEROV NIKOLAJ V,SU;SHEVCHENKO VALENTIN P,SU;ITSKHAKIN VLADLEN D,SU
发明人
PEROV NIKOLAJ V,SU;SHEVCHENKO VALENTIN P,SU;ITSKHAKIN VLADLEN D,SU
分类号
E21B43/28;(IPC1-7):E21B43/28;E21C41/14
主分类号
E21B43/28
代理机构
代理人
主权项
地址
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