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发明名称
WORKING-FACE SUPPORT
摘要
申请公布号
SU1656136(A1)
申请公布日期
1991.06.15
申请号
SU19894698827
申请日期
1989.05.31
申请人
PROIZV OB "KRAN"
发明人
BONDARENKO SERGEJ A,SU;TRUBNIKOV VLADIMIR P,SU
分类号
E21D23/06
主分类号
E21D23/06
代理机构
代理人
主权项
地址
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