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发明名称
METHOD AT MINING STEEP MEDIUM-THICKNESS MINERAL DEPOSIT SEAMS
摘要
申请公布号
SU1765408(A1)
申请公布日期
1992.09.30
申请号
SU19904867312
申请日期
1990.09.14
申请人
ZVYAGINTSEV IVAN S,SU;KOROLEV ANATOLIJ P,SU;ZVYAGINTSEV SERGEJ,SU
发明人
ZVYAGINTSEV IVAN S,SU;KOROLEV ANATOLIJ P,SU;ZVYAGINTSEV SERGEJ I,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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