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发明名称
METHOD OF EXCAVATING COMPOSITE BEDS OF MINERAL
摘要
申请公布号
SU644952(A1)
申请公布日期
1979.01.30
申请号
SU19762428273
申请日期
1976.12.13
申请人
VNI PI GALURGII
发明人
BRUSILOVSKIJ DAVID V,SU
分类号
(IPC1-7):E21C41/06
主分类号
(IPC1-7):E21C41/06
代理机构
代理人
主权项
地址
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