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发明名称
ALARM OF DISPLACEMENT OF ROOF ROCK OF MINE WORKING
摘要
申请公布号
SU1624149(A1)
申请公布日期
1991.01.30
申请号
SU19894653774
申请日期
1989.02.22
申请人
VDZEDZOYIUZNUYI NAUSNNO-IDZDZLEDOVATELDZKIYI INDZTITUT ZOLOTA REDKIKN METALLOV "VNII-1"
发明人
VUKDZNUK ALEKDZANDR A,SU;GITIN DZEMEN D,SU
分类号
E21C39/00
主分类号
E21C39/00
代理机构
代理人
主权项
地址
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