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发明名称
HEADING SET FOR MAKING MINE SHAFTS
摘要
申请公布号
SU875060(A2)
申请公布日期
1981.10.23
申请号
SU19782622155
申请日期
1978.05.31
申请人
DO POLT INSTITUT
发明人
STOEV ILYA S,SU;FILATOV VALERIJ F,SU
分类号
E21D5/12;(IPC1-7):E21D5/12
主分类号
E21D5/12
代理机构
代理人
主权项
地址
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