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发明名称
MINE WORKING ROOF BOLT
摘要
申请公布号
SU1286781(A1)
申请公布日期
1987.01.30
申请号
SU19853943957
申请日期
1985.08.20
申请人
URALSKIJ VNI PI GALURGII
发明人
KOVTUN VLADIMIR YA,SU;GERTSEN NIKOLAJ I,SU;KONDRASHEV PETR I,SU
分类号
E21D21/00
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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