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经营范围
发明名称
INTER-LEVEL ROOF SUPPORT
摘要
申请公布号
SU775328(A1)
申请公布日期
1980.10.30
申请号
SU19772448462
申请日期
1977.01.27
申请人
INST GORNOGO DELA SIBIRSKOGO
发明人
MAREVICH NADEZHDA V,SU;MATERI VALENTIN B,SU
分类号
E21D19/02;E21D19/06;E21D23/03;(IPC1-7):E21D19/02
主分类号
E21D19/02
代理机构
代理人
主权项
地址
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