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发明名称
SPARK-SAFETY ARRANGEMENT
摘要
申请公布号
SU1270373(A1)
申请公布日期
1986.11.15
申请号
SU19853919647
申请日期
1985.07.02
申请人
UK VNII GORNOJ GEOMEKHANIKI MARKSHEJDERSKOGO DELA
发明人
ALEKHIN GEORGIJ N,SU
分类号
E21F9/00;H02H3/00
主分类号
E21F9/00
代理机构
代理人
主权项
地址
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