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发明名称
METHOD FOR WORKING STRATA UNDER PROTECTED INDUSTRIAL AND ENGINEERING INSTALLATIONS
摘要
申请公布号
SU1677313(A1)
申请公布日期
1991.09.15
申请号
SU19894721774
申请日期
1989.07.20
申请人
VNII GORNOJ GEOMEKHANIKI MARK
发明人
MULLER RAKHMIEL A,SU;ZEMISEV VLADIMIR N,SU;FAJNSHTEJN YURIJ B,SU;GOLOSOVA IRINA N,SU
分类号
E21C41/18
主分类号
E21C41/18
代理机构
代理人
主权项
地址
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