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发明名称
METHOD OF ENHANCING LOAD-BEARING CAPACITY OF ROCK ENCLOSING A MINE WORKING
摘要
申请公布号
SU1553704(A1)
申请公布日期
1990.03.30
申请号
SU19884387356
申请日期
1988.03.01
申请人
ZVONAREV MIKHAIL,SU
发明人
ZVONAREV MIKHAIL I,SU
分类号
E21D20/00
主分类号
E21D20/00
代理机构
代理人
主权项
地址
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