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发明名称
DEVICE FOR FORMING RELIEF SLOTS IN ROCK MASS
摘要
申请公布号
SU1645497(A1)
申请公布日期
1991.04.30
申请号
SU19894637439
申请日期
1989.01.12
申请人
DO POLT INSTITUT
发明人
NIKOLIN VIKTOR I,SU;YAJLO VLADIMIR V,SU;LOPATOV OLEG A,SU;BOROVIK OLEG V,SU;ZHIGULIN ALEKSANDR A,SU
分类号
E21C25/58
主分类号
E21C25/58
代理机构
代理人
主权项
地址
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