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发明名称
METHOD OF BREKING HARD MATERIAL
摘要
申请公布号
SU1488474(A1)
申请公布日期
1989.06.23
申请号
SU19874329918
申请日期
1987.09.21
申请人
STAKHANOVSKIJ KOMMUNARSKOGO GORNO-METALLURGICHESKOGO INSTITUTA
发明人
VALUKONIS GENRIKAS YU,SU
分类号
E21C37/00
主分类号
E21C37/00
代理机构
代理人
主权项
地址
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