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发明名称
EXTENSIBLE ROOF BOLT FOR SUPPORTING MINE WORKINGS
摘要
申请公布号
SU1537824(A1)
申请公布日期
1990.01.23
申请号
SU19853899537
申请日期
1985.04.15
申请人
KISELEV VASILIJ G,SU
发明人
KISELEV VASILIJ G,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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