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发明名称
METHOD OF ROOF CONTROL WHEN MINING STEEP COAL SEAMS
摘要
申请公布号
SU1204722(A1)
申请公布日期
1986.01.15
申请号
SU19833636948
申请日期
1983.07.01
申请人
ROZENTAL MOISEJ B,SU;ILIN ANATOLIJ,SU;GRODZINSKIJ PETR YA,SU;VITKA MIKHAIL A,SU
发明人
ROZENTAL MOISEJ B,SU;ILIN ANATOLIJ I,SU;GRODZINSKIJ PETR YA,SU;VITKA MIKHAIL A,SU
分类号
(IPC1-7):E21C41/04
主分类号
(IPC1-7):E21C41/04
代理机构
代理人
主权项
地址
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