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经营范围
发明名称
UNIT FOR DRIVING FACE ENTRY IN STEEP COAL SEAMS
摘要
申请公布号
SU1514929(A1)
申请公布日期
1989.10.15
申请号
SU19874347390
申请日期
1987.12.21
申请人
DO NI UGOLNYJ INSTITUT
发明人
BEREZHNOJ BORIS A,SU;VASILEV ALEKSANDR G,SU;SARATIKYANTS SEMEN A,SU;SAMARSKIJ ANATOLIJ N,SU;STAROSELSKIJ SEMEN I,SU
分类号
E21C27/32
主分类号
E21C27/32
代理机构
代理人
主权项
地址
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